Customer Ratings & Reviews

Made my truck sound and feel like it did when it was new. Increased mileage by 2mpg, 6.7 Cummins, 152k miles.

Cleaned out a ton of crap from my Engine that had previously been leaking diesel fuel into the coolant system and coolant into my oil.

Get that sludge out! Helps to clean rings and restore compression.

The oil before I poured in the flush was clear but used... and after 15 minutes when I drained it was jet black .. and I found black flakes in the filter. The vehicle 2011 4runner is new to me 109,000 miles previous owner used mobile one

I used this before I did oil change and the extra stuff that gets loosened up and comes out is amazing. Great product.

Cleaned up the internals of my motor really good

cleans where I can't !!!

I use this flush every time I get a new car or am switching from a different oil brand to AMSOIL. Flush it out, change the oil and filter.

The answer is Yes! I know others that said it's not necessary, then I saw their valves and oil after their drain. Then I saw mine with the flush, I encourage everyone to do this with their engine to learn what I did.

Great product

This stuff is magic in a bottle. I've used it on two vehicles so far, with excellent results. The engines seem to run smoother and quieter than before using this product. Highly recommend.

I run Amsoil in everything!

Used it to clean out lifters and the lifters stopped knocking at cold start.

I used this on my !989 Ford Crown Victoria with the factory 302. I had somewhat recently changed the oil and it wasn't that dirty. When I changed over to Amsoil, I did the flush and there was a considerable darker color of oil that came out and was on the dipstick from when I started. Car actually seems to run a tad bit smoother and quieter as well.

Did a very well job on a high mileage cavi engine

I think it works

Swapping oils from conventional to Amsoil synthetic requires a product that can be relied on. The fact that Amsoil products are TESTED and not just manufactured for market value makes these products significantly superior to all the rest.

Good

After I checked my oil after the flush I noticed more gunk in the oil pan. Car runs better now

Work just was advertised. Be sure to follow directions. The only thing to remember is that if you use it on a high mileage engine cleaning out the crud will probably do more harm than good. Seal will leak and bearings will rattle.