Customer Ratings & Reviews

I feel great knowing that the oil im putting in is not gonna be contaminated by gunk in the engine.

BMW S1000XR. 52k on the bike, runs better than new. I expect to post someday with an extreme mileage score on original motor.

When you see the black color of the old oil you say to yourself : a regular flush is not enough. Why contaminate your new oil.

This gets out all the old and makes more room for the new. The only oil products I use!

Use this Before oil changed. You can definitely see the loose sludge particles come out after using it

Are you still in my voice Chevy Cruze for the oil change. And can actually see sludge particles come out when draining the engine oil after use.

Great Product

If you want to have the full protection amsoil can provide you need to run this through your vehicle first. It makes a huge difference, and will allow your vehicle to get the best out of having amsoil in it. Don't do this first ypu are robbing your vehicle of the protection amsoil can give it.

I used this product in a used municipal vehicle that I purchased at auction. Amsoil flush removed the varnish and build up in the top end of the engine and also solved the lifter ticking noise at start up. Definitely a must when changing oil in a used vehicle with no service records.

Used the flush in two of my vehicles and observed the dirty sludge that came out. I followed it up with Amsoil oil and the Performance Improver. Both are running great and seem to be running better than ever. Still in the trial stage, but so far I definitely recommend Amsoil!

Use it every time I change oil in my 2004 Chevy Silverado 5.3. Works great.

Well I use this ever 3rd or so oil change in hopes it does something

Engine seems to be running smoother, and hopefully it’s cleaner.

Another Quality Amsoil Product that I use only after frequent long winter idling or extended oil change miles / time. Good for getting an engine using dino oil ready for pure synthetic oil from Amsoil! Follow the directions and enjoy the benefits!

The amsoil Flush is a good Product flush the motor in the transmission up I will continue to use the flash on my vehicles in other peoples vehicles

I figured I'd give this engine flush a shot after buying a used car cheaply with an unknown service record. Obviously there were a few red flags up when the cash was handled, but even if that car burned to the ground on the way home, the deal I snatched it for made it worth the risk. I figured I'd try this flush prior to moving the car over to Amsoil synthetic oil as an attempt to flush out anything unwanted that might be residing in the engine. I poured the product in, waited the recommended amount of time, and let the oil drain for much longer than normal. The oil that came out was incredibly black and dirty, making my decision to give this a shot warranted in my book. My hope is that with a "clean" slate, I'll be able to continue driving this car for years to come. Time will tell, but this product is highly recommended.

Great product to use to flush out the system prior to changing the oil. Pour in, run for 15 minutes, change oil, really cleans things up nicely!

I use Amsoil products to lubricate every vehicle I own as well as every piece of equipment I own with an engine or motor. I see proof that all of these items get unsurpassed protection. The Amsoil engine/transmission flush followed by Amsoil synthetic oil was responsible for saving me thousands of dollars for an engine repair on my mid-mileage SUV. I won't use anything else! On top of this, I save money over local-purchase products by buying Amsoil every time. Protecting my equipment and saving money is a double win for me.

I used Amsoil flush in my new 2021 GMC Sierra (6.2 engine)and my 2011 Buick LaCrosse (3.6 engine) My first use was in my Buick with 157,000 miles and I could see the difference in my oil change with the gunk that was in my engine. My engine seemed more responsive and my gas mileage rose from 21.5 to 22 miles per gallon. I use it in my GMC to maintain the engine inside. I have used many Amsoil’s products because they are simply the best. Thanks Amsoil.

As a automotive painter I know that the best job is one that has been prepped properly. That’s why I use Amsoil Engine Transmission Flush before using Amsoil for the first time on gas engines and usually every time on my Diesel engines. It really cleans out the varnish and sludge that is harmful to today’s engines and plus preps the first time Amsoil use engines! It’s part of my oil change regimen and it should be yours as well!