Customer Ratings & Reviews

Great product, love recommending it.

I would say it is definitely doing something based on the color change in the oil. Checked oil with dipstick made note of color ran the flush through color was darker on the dipstick. When drained the oil it was definitely darker in color, so the flush is definitely loosening up some stuff in the engine.

Safe to use at every oil change, but you must follow the directions.

The same thing the best product ever

I had never used an engine flush before so I was a little apprehensive about trying it. But after following directions and seeing the gunk that this product removed from my motor I was sold. This product is amazing and I will never change oil again without using it. Great stuff

Dear AMSOIL, I've been using AMSOIL products for [length of time] and am happy with the results. I'd like to request information about your products and potentially place an order. Thanks! [DannyRayMcCurdy]

All their products are amazing. First time using this and it did not disappoint

I was told this is the real deal !!! It worked well to say the least. My Car was all carbed up as Dad would say. When I did the 15 minute run and drain I couldn’t believe the amount of thick carbon buildup turned liquid in my made up filter in my drain pan. I thought the car was toast but it is now at 2000 miles on this oil and has only burned a little oil. I’m going to flush it one more time when I get home in April and I no doubt will be impressed again!!! Highly recommend!!!!!

My local dealership recently had to replace the upper oil pan gasket. When I went to pick up my vehicle, the mechanic asked what type of oil I used. He was extremely impressed by the internal cleanliness of my engine at 120,000 miles.

I put this in my diesel engine and it cleaned out my diesel where the dipstick is showing the oil as yellow really good

Outstanding ,, the drain oil on my Cadillac was filthy , the car has 80,000 . Plan to use it again before next oil change.

used to flush the engine on my Chevy pickup. Easy directions

I only use it twice a year after the summer and after winter to clean inside the motor reviews on it was good so I just used it

Work great on 3.0 duramax

Is easy to use and I feel like it cleaned up the inside of my engine.

So far working as claimed

Broke down gunk prettttty well! Gotta love AMS!

Works great and safe for your engine

I used it as a preventive and believe it did what it is suppose to do. My crankcase on my classic car was not gummed up but the flush helped keep the internals clean.

Good Product