Customer Ratings & Reviews

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

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

Used the flush as directed, with the hope that it would remove some debris out of the motor that kept clogging my oil pressure screen, after draining and refilling with amsoil and a new filter the problem went away for one day. And then returned. May try the flush again with the hope that it will work better this time

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.

This stuff works great!

Used the flush as recommended, switched over to Amsoil oil

Was trying to address a torque converter shudder in my truck that would happen around 55 to 65 km/h, especially driving uphill under light throttle. Fluid wasn't burnt but definitely looked old and greyish-red. Followed the instructions and ran this stuff through my 4L60e before doing a passive flush through the radiator return port. I was hesitant to use this flush on my transmission since most reviews I found are for people using it in their engines. I removed and replaced fluid 3 to 4 quarts at a time by running the truck intermittently. The first 2-3 drains had a lot of visible fine metallic specs suspended in the fluid, which I 100% believe was due to the Amsoil Engine and Transmission Flush. Once I had removed more than the total capacity of the trans and started to consistently see fresh fluid, I dropped the pan and replaced the filter + gasket. Now, I have no way of knowing how much material was stuck to the pan magnet before the flush, but man that magnet was absolutely saturated with super-fine metallic particles. I filled the tranny back up after bolting up the pan, flushed out another 3 quarts or so, and filled it up the rest of the way. I exchanged and replaced a total of 20 quarts of ATF, with the last 10 quarts being Amsoil Signature Series Fuel-Efficient ATF. The shudder is gone and my shifts are much less sluggish. 1st to 2nd gear is still annoyingly harsh under light throttle, I can't expect a fluid flush to address that. Thanks Amsoil! Will be using this stuff in the engine as well before my next oil change.

This flush is pretty good. I have used this in all of my vehicles and impressed with the clean. I wouldn't use it every oil change, of course that's trying to just sell the product. I say use this every 50,000 maybe? I used another popular one where you have to drop the pan. This one is less work.

Have been using this on my Ford F250 after each oil change. I do notice that it cleans out the old oil and doesn't appear to harsh on the engine. I use 5W-40 Amsoil diesel oil and filter and it makes my F250 run like new, quieter and smoother.