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What’s The Best Oil For A 6.4 Hemi?

The 6.4-Liter Hemi engine is common in Chrysler performance cars and trucks. But if you are new to the engine, you may be wondering what oil is best to use. Let's look at the oil viscosity best for the 6.4 Hemi engine.

It is recommended to use 0W-40 oil in the 6.4 Hemi engine. This oil viscosity is best because it will flow well in cold temperatures and will not thin out too much in hot temperatures. However, you should always double-check the owner's manual of your vehicle to see what oil is recommended.

Using the correct oil for your engine is vital because it helps to protect the engine from wear and tear. This article will take a closer look at the recommended oil for the 6.4 Hemi engine. In addition, we will answer other maintenance questions about the popular Hemi engine, so read on!

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Front and side view of an immaculate Chrysler 300 with a 6.4 litre hemi engine, What's The Best Oil For A 6.4 Hemi?

What Oil Does the 6.4 Hemi Use?

The 6.4 Hemi engine is found in a variety of Chrysler vehicles. You can find it in Chrysler, Jeep, and Dodge vehicles.

The reason being is that the 6.4 Hemi engine is a high-performance engine. It needs oil that can protect it from wear and tear while providing excellent performance.

The ideal oil for the 6.4 Hemi engine is 0W-40 oil. This oil is recommended as it flows well in all temperatures, including cold temperatures.

In addition, 0W-40 oil will not thin out too much in hot temperatures. This is vital for an engine that produces much power, such as the 6.4 Hemi engine.

It is important to note that you should always check the owner's manual of your vehicle before changing the oil. This is because some models may require a different oil viscosity than others.

In general, however, most 6.4 Hemi engines will use 0W-40 oil. If you live in a frequently hot or cold climate, then you can double-check with your local dealership or mechanic to see if they recommend a different oil viscosity.

They may have a different opinion based on their experience with the 6.4 Hemi engine.

Black muscle car dodge challenger SRT8 392 HEMI parked in the city

How Often Should You Change the Oil in a 6.4 Hemi Engine?

You must change the oil every 5,000-7,500 miles or every six months, depending on your driving habits in a 6.4 Hemi engine.

If you do a lot of stop-and-go driving or drive in dusty conditions, you should change the oil more frequently. On the other hand, if you mostly drive on the highway, you can wait a little longer to change the oil.

The type of oil you use [synthetic or conventional] will also play a role in how often you need to change the oil. In general, synthetic oil can last longer than conventional oil. As such, you may be able to go longer between oil changes if you use synthetic oil.

You shouldn't drive over the recommended mileage or time before changing the oil. This is because the oil will break down and will no longer be effective at protecting the engine.

In addition, driving with old oil can cause the engine to overheat, leading to serious damage.

Therefore, it is best to change the oil according to the recommended schedule to keep your 6.4 Hemi engine in good condition.

Can You Change the Oil in a 6.4 Hemi Engine Yourself?

Yes, you can change the oil in a 6.4 Hemi engine yourself. However, it is always best to consult the owner's manual before performing any maintenance on your vehicle. This is because some models may have different instructions for changing the oil.

In general, changing the oil in a 6.4 Hemi engine is not much different than changing the oil in any other type of engine.

You must purchase the correct oil [0W-40], an oil filter, and a few tools. Once you have these items, you can follow the instructions below to change the oil in your 6.4 Hemi engine.

Car mechanic replacing and pouring fresh oil into engine at maintenance repair service station

How to Change the Oil in a 6.4 Hemi


  1. Warm up the engine: Start the engine and let it run for a few minutes. This will help loosen the oil and make it easier to drain.
  2. Place a catch basin beneath the oil pan: This will catch the used oil as you drain it.
  3. Remove the oil drain plug: This is usually located on the bottom of the oil pan. Use a wrench to loosen and remove the drain plug.
  4. Allow the used oil to drain out: Once the drain plug is removed, the used oil will start to drain out. Let it drain until it stops dripping.
  5. Replace the oil drain plug: Once the used oil has finished draining, replace the drain plug and tighten it with a wrench.
  6. Remove the old oil filter: The oil filter is usually located on the side of the engine. Use a wrench to remove it.
  7. Install the new oil filter: Take the new oil filter and screw it on in the same location as the old one.
  8. Fill up the engine with new oil: Use a funnel to pour new oil [0W-40] into the engine. Pour until the oil reaches the "full" line on the dipstick.
  9. Replace the oil fill cap: Once the engine has been filled with new oil, replace the oil fill cap and screw it on tight.
  10. Check for leaks: Start the engine and let it run for a few minutes. Then check underneath the vehicle for any oil leaks.

If there are no leaks, you successfully changed the oil in your 6.4 Hemi engine.

When disposing of the old oil, take it to a recycling center.

Do not pour it down the drain or throw it in the trash. You can also see if a mechanic shop will dispose of it for you.

How Much Oil Does a 6.4 Hemi Need?

You will need seven quarts of oil for your 6.4 Hemi engine. It is a good idea to keep an extra quart on hand in case you need to top off the oil level.

You can check the oil level by using the. The oil should be between the "full" and "low" lines on the dipstick. If it is below the "low" line, you will need to add more oil. Remember that adding oil is not a replacement for regularly changing the oil.

Checking the oil level in a car engine

You should still change the oil according to the recommended schedule, even if you must add a little in between changes.

Should You Use Synthetic or Conventional for the 6.4 Hemi?

For high-performance engines, synthetic oil is going to yield the best results. This is because it can withstand higher temperatures and will last longer than conventional oil.

Synthetic oil is also more resistant to breaking down, which means that it will do a better job of protecting the engine. For vehicles like the Dodge Challenger, or Jeep Grand Cherokee SRT, which have a 6.4 Hemi engine, synthetic oil is the best choice. This is because they are meant to be driven hard, and the synthetic oil will be able to handle the engine's demands.

If you are not planning on driving your vehicle hard, then you can get away with using conventional oil. However, it is still a good idea to use synthetic oil for the best protection.

In addition, if you tow a Ram 2500 or 3500, which also has a 6.4 Hemi engine, you will want to use synthetic oil. This is because synthetic oil can handle the higher temperatures generated when towing.

What Brand Oil Should You Use for the 6.4 Hemi?

While many different oil brands are on the market, they are not all created equal. Pennzoil synthetic is the go-to oil for MOPAR engines, which includes the 6.4 Hemi engine. This oil has been tested and proven to work well in these engines.

This doesn't mean you can choose a different synthetic oil brand, but Pennzoil is what is recommended.

Pennzoil platinum high mileage 5 quart oil containers inside car maintenance department of Walmart

Amsoil synthetic oil is another good choice for the 6.4 Hemi engine. This oil has a different chemical makeup than Pennzoil, which means it can provide different benefits.

However, engine oil isn't something you want to go cheap on. It is essential to use a high-quality oil, like Pennzoil or Amsoil, to get the best results.


Final Thoughts

By using the right oil and following the recommended change schedule, you can keep your 6.4 Hemi engine running strong for many years. Synthetic oil is the best choice for these engines, but you can use conventional oil if you are not planning on driving hard.

Just be sure to check the oil level regularly and top it off as needed.

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Friday 23rd of December 2022

No pennzoil available here in qld Australia, can I use 0 40 mobil 1 full synthetic?.