Customer Ratings & Reviews

All Amsoil products are high quality and make a true good difference in the performance of our vehicles.

I have used this product numerous times and it does the job. Really cleans the engine with very little effort. I use this on every third oil change.

Used for an engine oil change. Followed the directions and drained after pouring into the oil and running the motor. Oil was way darker than normal when I drained it. Scoped oil pan and it was way cleaner than before.

I have used it 4 times in 4 different vehicles, I did noticed the oil coming out way darker than it was before using. does it work, Maybe but it certainly helps to break down sludge.

It’ works wonders

This is the best additive on the market. I have heard about other products, but none have come close to compare with Amsoil. Not to mention the oil. I highly recommend this product to anyone, anywhere. Will continue to use all of Amsoil products bc it’s 100% Synthetic

Good product!!!

Used this before my first Amsoil filter and oil change, followed the directions. Wow, the oil was darker when I drained it. I will definitely use this before ever oil change. After I added it and was idling for 15 minutes, I noticed the engine smoothed out a bit and started getting a little quieter

I had a 2014 Impala with 240,000 miles that was starting to use a lot of oil. I added this to the next oil change, ran it and did the change and I still used a little oil. I did it again at my next 10,000 mile change and I have not used any oil between changes since.I now have 270,000 miles. it did a great job of cleaning out the motor.

The Oil Wasn't that dirty before the change -- but looks like brand new inside after.

I ran this through our car to remove excess carbon buildup. It performed as advertised. Very good product that I definitely recommend.

My 2011 had very low oil pressure due to sludge. After using the AMSOIL engine flush my oil pressure is 15 to 20 psi higher. Right where it should be. Thank you

Used this product twice now, on a high mileage vehicle and it seems to idle smoother

I use Amsoil products in everything i own i used this flush in my 99 ram with the 5.9 gas engine.

I have tried other ways to clean the engine sand crankcase but using this product does what it says it does.

Had oil and transmission flushed with my last oil and transmission change . Can feel the difference in shifting as well as overall performance in. The 4.4L twin turbo.

It freed up my sticking lifter.

Works like a BAU5E !

I use the engine flush every 3 oil changes and it hasn’t disappointed me yet great product

This stuff really cleans the motor after an oil change…runs out like water!! Love this stuff