We have always used this product in the used cars we’ve purchased. Why put clean oil in a dirty engine.

not the first time i use it will not be the last Great Product Thanks

I bought my 2013 EcoBoost with 70,000 miles on it. Been using the motorcraft full synthetic in it since purchase. In the last year and a half I put almost 35,000 mi on it and it definitely hasn't been running as smooth. I noticed my oil had been coming out dirtier than normal on the last two oil changes. So I decided to start using amsoil signature series. Before I switched over I drained the oil and threw on a new filter and filled it up with motorcraft full synthetic. After a week of driving on it I dumped a bottle of this flush in the oil and let it idle for 15 minutes. The oil I drained out looked as if I had put another 5,000-10k miles on it. Maybe even dirtier than previous oil changes. I decided to flush it again with some clean oil, and even then more debris and carbon came out(without the additive). I am now switched over to signature series amsoil, hoping that'll make a difference. Only Time Will tell. But as far as flushing out carbon and engine deposits. I can visually verify that this stuff does what it says it will do. Great stuff. Next month we do the transmission!

Flush my oil every oil change

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

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

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 don't know one way or the other how much it helped, my mechanic didn't didn't have an answer on how much it helped, but used it anyways as it was already purchased.

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

great!!

I think it works