Customer Ratings & Reviews

Wow this stuff works like magic! I’ve always taken great care of my car and changed my oil and filter regularly at 5,000 miles even though the signature series oil is the best PA0 based synthetic oil. I honestly never thought about a flush? Well I had my car since it was new and done every oil change on it never had flushed it before so I did 70,000 miles later and it cleared out the whole oil system! I could tell because I ran my inspection camera through the engine everywhere I was able to and wow after only one time? Never seen anything work so well. Thanks Amsoil for making such great products that actually work.

Use this product often during oil changes. Great product.

If you waited too long between changes or flushes you could see some boogers of varnish flush out but no impact on wear and seems to clean varnish and durable deposits with regular use.

Let's go, try it. :)

Used at every change on my 2017 Mazda 3 2.5 at every 5K oil & filter change with Amsoil Sig Ser. The engine was already very clean when I got it with 67,000 on it. I probably wouldn't if it had sludge -- for fear of filling the pan with goo. Now at 99,600, and 400 away from an oil change -- it still has zero varnish.

This product is excelente. Cleaner is great.

Will use nothing else but the best!

As a female who works on all 3 of my vehicles, I can sometimes get overwhelmed with doing vehicle maintenance and repairs as I am learning as I go. So when I went to the Amsoil website wanting to switch my daily car over, I had no idea what it entailed. Amsoil makes it super easy to switch from regular oil to theirs!! This flush is so easy to use!! Just dump it in with the current oil and run your vehicle for 15 minutes. Then you drain it as usual and switch to an amsoil oil filter, add your amsoil and boom! Done! So easy a girl can do it lol.

If you catch yourself looking at this product, chances are you've changed the oil in your vehicle plenty a time before, but want the ultimate clean for your internals. Although Amsoil has arguably the best detergent/additives package and oil could have, using their ultimate detergent in a bottle is just extra security for changing the oil. Truck just hit 115000 miles and I wanted to do a full flush, directions were simply, drained as normal with the old oil, I could definitely tell that the oil was not alone, black deposits came out too, nothing magnetic (magnetic pickup wouldn't attract/repel). Get some while you're looking at it, can't hurt, definitely could help!

Having a turbo charged Honda civic this stuff is great I use it before every oil change. I feel like it extra cleans out all the junk and car runs really smooth at 80k miles.

Used once at 170k miles oil was clean prior to flush but after flush it was black definitely worked

Does what it’s meant to do

I use this with every oil change. I have yet to try this on my manual transmission gear oil flush, but I'm sure it will help. This is the absolute Best flush ever!

Only used this in the engine and everyone change oil I utilize 1 bottle in either gas or diesel. It breakdowns the oil to a watered state so I can get all of it out + debris that flows out with it. It’s great stuff.

At frist I didn't think it was working but the the 3rd time I pulled dipstick out I was amazed at the results

I have a 2017 grand Cherokee with 198000mes on it. I tried this and you should have seen the stuff come out of the oil pan drain hole. I will most definitely be using again.

The first time I used this I was shocked how much sludge came out of my oil pan. Some people would say you don't change your oil enough well I do change it every time the oil starts turning black. Probably why I have 254k miles on a 4.3 liter vortex and still runs strong.

I use this on every other oil change, and it makes my changes quicker as it lightens the oil, and also provides a thorough cleaning to make sure that old oil and particles come out during the change.

I’ve been having some louder than normal drivetrain noise lately in my Z06 and adding this flush before my oil change has quieted it down significantly, I’m not hearing the lifter tick anymore.

I used this product in two of my vehicles and the engine is extremely clean. I wouldn’t hesitate to use it again.