How to change oil Toyota Prius

As a mechanic with many years of experience working on cars, I’ve seen a lot of vehicles come and go. One car that has really caught my attention over the years is the Toyota Prius. The Prius has been around for several generations now, and it’s been fascinating to watch its evolution.

The Prius was first introduced back in 1997, although it wasn’t available in the United States until 2000. At the time, it was one of the first mass-produced hybrid vehicles on the market, and it quickly gained a reputation as an environmentally friendly and fuel-efficient car.

The first generation of the Prius had a lot of room for improvement, however. While it was certainly innovative, it had a few flaws that needed to be addressed. The battery pack was relatively small, which meant that the car had limited electric-only driving range. Additionally, the car’s performance left a lot to be desired, and it was far from sporty.

Fortunately, Toyota listened to customer feedback and worked hard to improve the Prius with each subsequent generation. The second generation, which was introduced in 2004, was a significant improvement over the original. It had a more powerful electric motor, a larger battery pack, and a much more refined driving experience overall.

Over the years, Toyota has continued to refine and improve the Prius, releasing several more generations of the car. Each new version has built upon the successes of the previous generation, adding new features, improving performance, and increasing fuel efficiency.

So, what makes the Prius such a good car? Well, from my perspective as a mechanic, there are a few things that stand out. First and foremost, it’s incredibly reliable. I’ve seen Priuses with well over 200,000 miles on the odometer that still run like new. Additionally, the car’s hybrid system is incredibly efficient, which means that it’s both eco-friendly and easy on the wallet.

Overall, I’ve been incredibly impressed with the Toyota Prius over the years. It’s a testament to the power of innovation and the ability of car manufacturers to listen to customer feedback and make meaningful improvements to their products.

Do I need to change my oil now?

What is the frequency (interval) of changing engine oil?

As an experienced auto mechanic, I can tell you that the frequency for changing the engine oil in a Toyota Prius can vary depending on several factors. The general recommendation for a Toyota Prius is to change the engine oil every 10,000 miles or 12 months, whichever comes first. However, this interval may change depending on the following situations:

1. Driving conditions: If you drive in severe conditions, such as dusty roads, extreme temperatures, or stop-and-go traffic, you may need to change the engine oil more frequently. Severe driving conditions can cause the engine oil to break down more quickly and become less effective at lubricating and protecting the engine.
2. Type of oil: The recommended oil for a Toyota Prius is 0W-20 synthetic oil. If you use a different type of oil, such as conventional oil or a different viscosity, you may need to change the oil more frequently.
3. Age of the vehicle: As a vehicle gets older, the engine may start to consume more oil, which can affect the oil change frequency. If your Prius is burning oil, you may need to change the oil more frequently.
4. Driving habits: If you frequently drive your Prius at high speeds or for long distances, you may need to change the oil more frequently. This is because the engine will be working harder and generating more heat, which can cause the oil to break down more quickly.

In summary, the recommended interval for changing the engine oil in a Toyota Prius is every 10,000 miles or 12 months, but this can vary depending on driving conditions, type of oil, age of the vehicle, and driving habits. It’s important to consult your owner’s manual and follow the manufacturer’s recommendations to ensure that your Prius is properly maintained and running smoothly.

How to check the engine oil level?

Checking the engine oil level in your vehicle is an important part of regular maintenance, as it helps ensure that your engine is properly lubricated and protected. Here’s how to check the engine oil level in your vehicle:

1. Make sure the engine is turned off and has cooled down for at least 10 minutes to allow the oil to settle in the oil pan.
2. Open the hood of the vehicle and locate the engine oil dipstick. It’s typically a brightly colored handle or loop that’s labeled “Engine Oil.”
3. Pull the dipstick out of the engine and wipe it clean with a cloth or paper towel. Be sure to wipe the entire length of the dipstick to remove any oil residue.
4. Reinsert the dipstick all the way back into the engine and then pull it out again. Check the oil level on the dipstick, which should be between the two marks labeled “Full” and “Add.” If the oil level is below the “Add” mark, you’ll need to add more oil to bring it up to the proper level.

If you find that the engine oil level is low, it’s important to take action right away to prevent damage to the engine. Here’s what you should do:

1. Purchase the correct type of engine oil for your vehicle, which can be found in the owner’s manual or on the oil filler cap.
2. Remove the oil filler cap and add the necessary amount of oil, using a funnel if necessary. Be careful not to overfill the engine, as this can also cause problems.
3. Recheck the oil level with the dipstick to ensure that the oil level is now between the “Full” and “Add” marks.
4. Start the engine and let it run for a few minutes to allow the oil to circulate throughout the engine.

By regularly checking the engine oil level and adding more oil as needed, you can help ensure that your engine is properly lubricated and protected, which can help extend its lifespan and prevent costly repairs.

Visual (express) assessment of the condition of engine oil

Visual inspection is a quick and easy way to get a rough idea of the current state of your engine oil. Here’s what to look for:

1. Check the color of the oil: Fresh engine oil is typically amber or light brown in color, but as it ages and becomes contaminated with dirt and debris, it can become darker in color. If the oil is very dark or black, it may be time for an oil change.
2. Look for metal flakes or particles: If you see shiny metal flakes or particles in the oil, it could be a sign of engine wear and may require further inspection by a professional mechanic.
3. Check for a milky appearance: If the oil has a milky appearance, it may be contaminated with coolant, which could be a sign of a blown head gasket or other serious problem.

While visual inspection can give you a rough idea of the state of your engine oil, it’s not always the most accurate way to assess its condition. A more reliable method is to use a paper test strip, which can quickly and easily give you a more precise reading of the oil’s condition. Here’s how to perform a paper test:

1. Obtain an oil test strip, which can be purchased at an auto parts store or online.
2. Start the engine and let it run for a few minutes to warm up the oil.
3. Turn off the engine and wait a minute or two for the oil to settle.
4. Dip the test strip into the oil and then remove it immediately.
5. Compare the color of the test strip to the color chart that comes with the strip. This will give you a precise reading of the oil’s condition, including its acidity, contaminants, and viscosity.

By performing regular visual inspections and occasional paper tests, you can help ensure that your engine oil is in good condition and that your engine is properly lubricated and protected. If you have any concerns about the condition of your engine oil, it’s always a good idea to consult with a professional mechanic.

Preparing for an oil change

What type of oil should be used for a car?

Here’s a table with the recommended engine oil types for various generations and engines of the Toyota Prius series:

Prius Generation	Engine Type	Recommended Engine Oil Type
1st (1997-2003)	1NZ-FXE	5W-30
2nd (2004-2009)	1NZ-FXE	5W-30
	2ZR-FXE	0W-20 or 5W-20
3rd (2010-2015)	2ZR-FXE	0W-20 or 5W-20
	2ZR-FXE (Plug-in)	0W-20 or 5W-20
4th (2016-2021)	2ZR-FXE	0W-20 or 5W-20
	2ZR-FXE (AWD-e)	0W-16 or 0W-20
5th (2022-Present)	2ZR-FXE (Hybrid)	0W-16 or 0W-20
	2ZR-FXE (AWD-e)	0W-16 or 0W-20

Note that the recommended engine oil types may vary depending on the region, driving conditions, and other factors. It’s always best to consult the owner’s manual or consult with a professional mechanic to determine the best engine oil type for your specific vehicle. Using the recommended engine oil can help ensure proper engine lubrication and extend the life of your Toyota Prius.

How to choose oil depending on the season and operating conditions?

Choosing the right engine oil for your Toyota Prius depends on a variety of factors, including the season, driving conditions, and the type of engine oil recommended by the manufacturer. Here are some general guidelines for selecting engine oil based on these factors:

1. Season: In colder climates, it’s generally recommended to use a lower viscosity oil, such as 0W-20 or 5W-20, to ensure proper oil flow and engine lubrication in cold temperatures. In warmer climates, a higher viscosity oil, such as 5W-30 or 10W-30, may be more appropriate. It’s also important to follow the manufacturer’s recommendations for the recommended oil viscosity range based on temperature.
2. Operating conditions: If you frequently drive in stop-and-go traffic or engage in frequent short trips, your engine may require more frequent oil changes and a higher quality oil to maintain proper lubrication. If you frequently tow heavy loads or drive in dusty or dirty conditions, a high-quality synthetic oil may be recommended to provide maximum protection against engine wear and tear.
3. Manufacturer recommendations: Always refer to the owner’s manual for your specific vehicle to determine the recommended engine oil type, viscosity, and change interval. Using the manufacturer-recommended engine oil is the best way to ensure proper engine lubrication and protect against engine damage.

Overall, selecting the right engine oil for your Toyota Prius is an important step in ensuring the longevity and performance of your vehicle. By considering factors such as season, operating conditions, and manufacturer recommendations, you can choose an engine oil that will provide maximum protection and help keep your engine running smoothly.

What are the advantages and disadvantages of different types of oils for Toyota Prius?

There are several different types of engine oils available on the market, each with their own advantages and disadvantages for use in Toyota Prius vehicles. Here are some of the most common types of engine oils and their pros and cons:

1. Conventional oil:

• Advantages: Conventional oil is widely available and affordable, making it a popular choice for many drivers. It also provides adequate lubrication for most vehicles, including Toyota Prius models.
• Disadvantages: Conventional oil tends to break down more quickly than synthetic oils, and it may not provide the same level of protection against engine wear and tear.

2. Synthetic oil:

• Advantages: Synthetic oil offers superior protection against engine wear and tear, and it can last longer than conventional oil. It also flows better at low temperatures, which can be beneficial in colder climates.
• Disadvantages: Synthetic oil is more expensive than conventional oil, and it may not be necessary for all vehicles. Some drivers may also prefer the feel of conventional oil in their engine.

3. High-mileage oil:

• Advantages: High-mileage oil is formulated with additives that can help prevent leaks and reduce oil consumption, making it a good choice for older vehicles or vehicles with high mileage.
• Disadvantages: High-mileage oil may not provide the same level of protection against engine wear and tear as synthetic oil, and it may be more expensive than conventional oil.

4. Blend oil:

• Advantages: Blend oil offers a combination of synthetic and conventional oils, providing some of the benefits of both types.
• Disadvantages: Blend oil may be more expensive than conventional oil, and it may not provide the same level of protection as full synthetic oil.

Overall, the type of engine oil you choose for your Toyota Prius will depend on factors such as driving habits, climate, and the recommendations of your vehicle manufacturer. It’s important to choose an engine oil that meets the specific needs of your vehicle to ensure optimal engine performance and protection against wear and tear.

Engine oil selection

Table with recommended engine oil specifications for various generations of the Toyota Prius:

Generation	Engine	Recommended Viscosity	Popular American Brands	Required Oil Amount	Article Number	Approximate Cost (USD)
1 (2001-2003)	1NZ-FXE	5W-30	Mobil 1 Extended Performance, Pennzoil Platinum, Valvoline MaxLife	3.9 quarts	00279-0W20A	$8-10
2 (2004-2009)	1NZ-FXE	0W-20	Royal Purple, Castrol Edge, Amsoil Signature Series	3.9 quarts	00279-0W20	$10-12
3 (2010-2015)	2ZR-FXE	0W-20	Mobil 1 Annual Protection, Castrol GTX Magnatec, Valvoline High Mileage	4.4 quarts	00279-0W20	$8-10
4 (2016-2021)	2ZR-FXE	0W-16	Pennzoil Ultra Platinum, Quaker State Ultimate Durability, Mobil 1 Extended Performance	4.4 quarts	08885-80810	$10-15
5 (2022-Present)	2ZR-FXE	0W-16	Amsoil Signature Series, Royal Purple HMX, Castrol Edge High Mileage	4.4 quarts	08885-80810	$15-20

Please note that the recommended engine oil specifications and costs may vary depending on your location and local market conditions. It’s always best to consult your vehicle owner’s manual and follow the manufacturer’s recommendations for optimal engine performance and longevity.

Which oil filter is right for you?

Table with recommended oil filter specifications for various generations of the Toyota Prius:

Generation	Engine	Popular American Brands	Catalog Number	Approximate Cost (USD)
1 (2001-2003)	1NZ-FXE	Fram Ultra Synthetic, Mobil 1 Extended Performance, Bosch Premium Oil Filter	XG3600	$10-15
2 (2004-2009)	1NZ-FXE	K&N Pro Series, WIX XP, Purolator Boss	PS-7020	$10-20
3 (2010-2015)	2ZR-FXE	Royal Purple Extended Life, Mobil 1 Extended Performance, K&N Pro Series	XG3614	$8-12
4 (2016-2021)	2ZR-FXE	PurolatorONE, Fram Tough Guard, Bosch Premium Oil Filter	57047	$8-15
5 (2022-Present)	2ZR-FXE	K&N Pro Series, Royal Purple Extended Life, Fram Ultra Synthetic	XG6607	$10-20

Please note that the recommended oil filter specifications and costs may vary depending on your location and local market conditions. It’s always best to consult your vehicle owner’s manual and follow the manufacturer’s recommendations for optimal engine performance and longevity.

How to warm up the engine before changing the oil?

Warming up the engine before an oil change is not necessary and may not be recommended by some manufacturers. In fact, it’s usually best to change the oil when the engine is cool or has been off for some time, as the oil will have settled to the bottom of the oil pan, making it easier to drain.

However, if you do want to warm up the engine before changing the oil, the recommended method is to start the engine and let it run for about 5-10 minutes to allow the oil to circulate and become more fluid. Then, turn off the engine and wait for it to cool down to a safe working temperature before beginning the oil change. It’s important to use caution and follow proper safety procedures when working with hot engine components.

Necessary tools and conditions

Tools and conditions you will need to prepare for an independent engine oil change for a Toyota Prius:

1. Oil filter wrench: This will help you remove the old oil filter and replace it with a new one.
2. Drain pan: A large container or pan to collect the used oil when you drain it from the engine.
3. Funnel: To help you pour new oil into the engine without spilling it.
4. Jack stands or a car lift: To lift the vehicle off the ground so that you can safely access the underside of the car and the oil drain plug.
5. Oil: You will need the correct type and amount of oil for your Toyota Prius. This information can be found in your owner’s manual or by consulting with an automotive professional.
6. Oil filter: You will also need a new oil filter for your Toyota Prius. The correct type and size can be found in your owner’s manual or by consulting with an automotive professional.
7. Rags or paper towels: To clean up any spills or messes.
8. Gloves: To protect your hands from hot oil and any other potential hazards.
9. Safety glasses: To protect your eyes from any splashing oil or debris.

Before starting your oil change, make sure you have a level and stable working surface, and that you have enough time to complete the job without rushing. Also, be sure to dispose of the used oil and filter properly at a designated recycling center.

Step-by-step instruction

Step-by-step instructions for beginners to change the engine oil in a Toyota Prius:

1. Gather all necessary tools and materials, including oil, oil filter, oil filter wrench, drain pan, funnel, jack stands or car lift, rags or paper towels, gloves, and safety glasses.
2. Park the car on a level surface and turn off the engine. Allow the engine to cool down before starting the oil change.
3. Use the jack stands or car lift to raise the front of the car off the ground. Make sure the car is secure and stable before crawling underneath it.
4. Locate the oil drain plug under the car. Place the drain pan under the plug to catch the old oil. Use the wrench to loosen the plug and let the old oil drain into the pan. Wait until the flow of oil has slowed down to a drip before replacing the drain plug.
5. Locate the oil filter, which is usually near the oil pan. Use the filter wrench to remove the old filter. Make sure to drain any remaining oil from the old filter into the drain pan.
6. Apply a small amount of new oil to the gasket on the new filter, and then install the new filter by hand, tightening it as much as possible without using the filter wrench.
7. Refill the engine with the recommended amount and type of oil, using the funnel to pour the oil into the oil filler hole. Check the oil level with the dipstick to ensure that it is at the proper level.
8. Start the engine and let it run for a few minutes, then check for any leaks around the oil drain plug and filter. If everything looks good, turn off the engine and wait a few minutes for the oil to settle.
9. Use the dipstick to check the oil level once again, and add more oil if needed. Make sure the oil level is within the recommended range.
10. Clean up any spills or messes, and dispose of the old oil and filter properly at a recycling center.

The duration of an oil change will depend on the skill level of the person performing the job, but it typically takes around 30 minutes to an hour to complete. Beginners should take their time and follow each step carefully to ensure a successful oil change.

Replacing transmission fluid in automatic transmission

What is the frequency (interval) of changing the transmission fluid in an automatic transmission?

The frequency (interval) for changing the transmission fluid in a Toyota Prius with an automatic transmission varies depending on the model year and the type of transmission. For example, for the 2016 Toyota Prius with a Continuously Variable Transmission (CVT), the recommended interval is to inspect the transmission fluid every 60,000 miles and replace it as needed.

However, it’s important to note that the recommended interval may differ depending on the specific model year and transmission type. It’s always best to consult the owner’s manual or contact a certified Toyota technician to determine the specific recommended interval for your Toyota Prius.

What transmission fluid to choose?

Table with the selection of transmission fluid for Toyota Prius:

Generation	Engine Name	Fluid Capacity	Popular Brands in US	Catalog Number	Approximate Cost (US)
1st Gen (2001-2003)	1NZ-FXE	3.2 qt	Toyota WS, Valvoline MaxLife, Mobil 1 Synthetic ATF	08886-02206, 804751, 112980	$9-$12 per quart
2nd Gen (2004-2009)	1NZ-FXE	3.9 qt	Toyota WS, Valvoline MaxLife, Mobil 1 Synthetic ATF	08886-02305, 804751, 112980	$9-$12 per quart
3rd Gen (2010-2015)	1.8L 2ZR-FXE, 1.5L 1NZ-FXE	3.9 qt	Toyota WS, Valvoline MaxLife, Mobil 1 Synthetic ATF	08886-02305, 804751, 112980	$9-$12 per quart
4th Gen (2016-2021)	1.8L 2ZR-FXE	3.7 qt	Toyota WS, Valvoline MaxLife, Mobil 1 Synthetic ATF	08886-02406, 804751, 112980	$9-$12 per quart

Required Tool

To replace the transmission fluid in a Toyota Prius automatic transmission, you will need the following tools and conditions:

Tools:

• Jack stands or a vehicle lift
• Drain pan
• Funnel
• Socket set
• Ratchet wrench
• Torque wrench
• Transmission fluid pump or a long flexible hose
• Fluid level checker

Conditions:

• A flat, level surface to work on
• Safety glasses and gloves
• A new transmission fluid filter and gasket (if applicable)
• The correct type and amount of transmission fluid for your specific Toyota Prius model
• A suitable disposal method for the old fluid

It’s important to note that transmission fluid replacement can be a complex process and may require specific knowledge and experience. If you are unsure about the process or lack the necessary tools, it’s recommended to have a certified Toyota technician perform the fluid replacement.

Step-by-step instruction

Changing the transmission fluid in an automatic transmission of a Toyota Prius can be a complicated process. It’s recommended to have a certified Toyota technician perform the fluid replacement. However, if you are determined to perform the task yourself, follow these steps:

1. Make sure the vehicle is on a level surface and the engine is turned off.
2. Raise the car using jack stands or a vehicle lift.
3. Locate the transmission fluid pan under the car. It’s usually located toward the front of the vehicle.
4. Place a drain pan under the transmission fluid pan.
5. Using a socket wrench, remove the bolts securing the transmission fluid pan to the transmission housing. Remove the pan slowly and carefully as the fluid may still be hot.
6. Drain the old fluid from the pan into the drain pan. Make sure to dispose of the old fluid properly.
7. Remove the old transmission fluid filter and gasket (if applicable) and replace it with a new one. Make sure to clean the transmission fluid pan before re-installing it.
8. Re-install the pan and bolts, and tighten them to the manufacturer’s specified torque. Do not over-tighten the bolts.
9. Locate the transmission fluid dipstick and remove it from the tube.
10. Using a fluid pump or long flexible hose, fill the transmission with the correct amount of new transmission fluid through the dipstick tube. It’s important to use the correct type of transmission fluid for your specific Toyota Prius model.
11. Start the engine and let it run for a few minutes. Shift the transmission through all the gears to help distribute the new fluid.
12. Check the transmission fluid level using the fluid level checker. The fluid level should be between the minimum and maximum marks on the dipstick.
13. Lower the car back to the ground and turn off the engine.
14. Dispose of the old fluid and any used supplies properly.

It’s important to note that transmission fluid replacement can be a complex process and may require specific knowledge and experience. If you are unsure about the process or lack the necessary tools, it’s recommended to have a certified Toyota technician perform the fluid replacement.

Possible questions after self-service

How can I check for engine oil leaks after changing it myself?

After changing the engine oil yourself, it’s important to check for any potential leaks to ensure that the new oil is properly circulating in the engine. Here are some steps you can take to check for engine oil leaks:

1. Wipe down the engine – Before you start checking for oil leaks, use a clean rag or paper towel to wipe down the engine to remove any residual oil or dirt that may have accumulated during the oil change.
2. Inspect the oil filter – Check the oil filter to ensure it’s installed correctly and tight. If the filter is loose, it can cause an oil leak. If you notice any leaks around the filter, tighten it accordingly.
3. Inspect the drain plug – The drain plug is another common source of oil leaks. Make sure the drain plug is tightened properly and not cross-threaded. If you notice any leaks around the drain plug, tighten it accordingly.
4. Check the oil pan – Inspect the oil pan and the gasket for any signs of leakage. If you notice any leaks, tighten the oil pan bolts or replace the gasket.
5. Inspect the oil pressure switch – If your vehicle has an oil pressure switch, check for any signs of leakage around the switch. If you notice any leaks, tighten the switch or replace it.
6. Check the valve cover gasket – The valve cover gasket seals the top of the engine and can become worn over time. Inspect the gasket for any signs of leakage, and if necessary, replace the gasket.
7. Start the engine and check for leaks – After inspecting the engine, start the engine and let it run for a few minutes. Check for any signs of leaks around the oil filter, drain plug, oil pan, or valve cover gasket. If you notice any leaks, turn off the engine and make the necessary adjustments.

By following these steps, you can ensure that the engine oil is circulating properly and there are no leaks. It’s important to fix any leaks as soon as possible to prevent damage to the engine and ensure its longevity.

What problems can arise after an incorrect self-changing engine oil?

Changing the engine oil yourself can save you money and provide a sense of satisfaction, but if not done correctly, it can lead to some problems with your vehicle. Here are some potential problems that can arise after an incorrect self-changing engine oil:

1. Oil leaks – If the oil filter or drain plug isn’t tightened properly or if the gasket is not properly installed, it can lead to oil leaks, which can cause damage to the engine and other components of the car.
2. Overfilling or underfilling – Adding too much or too little oil can cause problems with the engine’s lubrication system, leading to reduced engine performance, excessive wear and tear, and even engine damage.
3. Using the wrong type of oil – Using the wrong type of oil or incorrect oil viscosity can result in poor engine performance, increased engine wear, and decreased fuel efficiency.
4. Contamination – If the oil is contaminated with dirt, debris, or other fluids, it can cause damage to the engine and other components of the car.
5. Damage to the oil filter – If the oil filter is not installed properly or is damaged during the oil change process, it can result in engine damage and poor engine performance.
6. Damage to the drain plug – If the drain plug is not installed properly or is damaged during the oil change process, it can result in oil leaks and engine damage.

In summary, it’s important to take the time to properly change the engine oil to avoid these potential problems. If you are unsure of your ability to change the oil yourself, it’s always best to have a professional do the job to ensure that it’s done correctly.

How to reset the oil change indicator?

To reset the oil change indicator on a Toyota Prius after service, follow these steps:

For 3rd generation (2010-2015):

1. Turn the ignition switch to the “ON” position (do not start the engine).
2. Press the “TRIP” button on the dashboard until the trip meter displays “ODO”.
3. Turn the ignition switch to the “OFF” position.
4. Press and hold the “TRIP” button while turning the ignition switch to the “ON” position (do not start the engine).
5. Continue holding the “TRIP” button until the trip meter displays “000000” and the maintenance light turns off.

For 4th and 5th generations (2016-present):

1. Press the “POWER” button (do not start the engine).
2. Press the “APPS” button on the infotainment display.
3. Select “Maintenance” and then “Reset”.
4. Follow the on-screen instructions to reset the oil change indicator.

Note: It’s important to check the owner’s manual for specific instructions for your vehicle model as the reset procedure may vary depending on the year and model of the Toyota Prius.

What to do with old oil after replacement?

Proper disposal of used engine oil is important to protect the environment. Here are some guidelines on what to do with old used engine oil after self-replacement:

1. Drain the used engine oil into a clean, leak-proof container, such as a plastic milk jug or a dedicated oil drain pan.
2. Do not mix used engine oil with any other substances, including gasoline, antifreeze, or other fluids.
3. Take the used engine oil to a recycling center or service station that accepts used oil. Most auto parts stores and repair shops will accept used oil for recycling.
4. Do not pour used engine oil on the ground, down a drain, or in the trash.

By properly disposing of used engine oil, you can help prevent pollution and protect the environment.