Amsoil Engine Flush: Does it work?

In this video I use Amsoil engine flush on my 2009 Ford Expedition with 222,000km. I tried a little experiment using clean oil and filter to determine if we could actually see visually the sludge/dirt/deposits that Amsoil Engine Flush claims to remove. The results are surprising.

[bikerdogb]

I would have done the oil change, ran without Amsoil for 15 min drained a cup or so, poured the amsoil flush in ran for 15 mins and compared the two samples. Thank you for taking the time to make this video I would still say it works!

[Vikingstw]

This is an interesting test. One thing I've picked up on over the years with the engine flush is to get the engine hot before you do the flush. Amsoil Dealer came up with the idea and to me it made a lot of sense they claimed it cleaned better. One thing I always do is put a fresh filter on when doing a flush and they usually come out very heavy after draining the oil like they caught a lot of contaminants during flush. If you are wanting to keep that engine clean just run Amsoil in it, whatever the flush doesn't get the oil will in due time. Amsoil is far superior to most motor oils I would never use anything else. Anyone that has documented long term use in one engine with Amsoil comes up almost fake like results when the engines are broke down. More testimonies are popping up but a lot of them are untold on youtube, the oil has been around along time.

[cbidwell]

As an AMSOIL dealer, running brand new oil in an engine that has any sort of mileage on it will come out darker. This is not an indicator of how dirty the oil is. I've actually sampled oil which held engine flush in it and the feedback from the analyst did not show any abnormalities. IMO, the only real way to know how well this works would be to pull a valve cover and see if previous sludge buildup is now diminished. Engine flush is a good product, as its a high dosage of cleaners. Doing this same test with a cheap synthetic may yield better results. People just buy into tests like this as if they are valid. Do your maintenance, flush as needed, and your engine will run long and strong!

[TheBeatenPaths]

Great video!! I'm an Amsoil dealer and I've been hoping someone would test their Flush like this!

[aaronsbullitt]

I’m a Preferred Customer with Amsoil and I love their products. Been using them for 2 years now and I have switched many friends and family over to Amsoil. They all love it too. Thanks for the comparison!

[danielc]

Do the EXACT same test, except minus the cleaner, let me know how that oil looks....

[mattmcdermott]

Great video. My vehicles are 100% AMSOIL. It's night and day difference from dino oil too 100% synthetic oil. The flush does a great job too! I have a 5.9 Cummings with almost 400K miles and I use the flush every oil change because of the suit from the exhast. I have gone 25k miles with the oil. I have a oil bypass system plus the AMSoil. Very cool! I also have a 2012 ram that is still factory... Not deleted on a 6.7 Cummings. I can go about 15, 000 to 18, 000 miles between oil changes. I'd go longer but there gets diesel fuel in my oil because it's always doing regeneration of the DPF. Darn EPA!!! Again, Great video!

[jeffhdpd]

After watching this I did the exact same thing on my rogue when I changed the oil. All I can say is that it works great. the oil came out black as coal when I flushed it. Stuff does a great job. Not sure if its better than any other oil flush but either way it works

[lamarc]

Great video, I used the engine flush on my car before switching to Amsoil. I was wondering how much sludge it removed & this pretty much answered the question

[caseyballard]

I'm an Amsoil dealer and I'm happy see someone test this product thoroughly

[tossedsalad]

Great job on oil flush .... Using transmission fluid as a engine flush is cheaper and just as effective ....

I pour 2 litres of diesel fuel into a engine after draining oil then put the drain plug back in and pour in diesel fuel to help clean bottom of the engine oil pan.

I then pour cheap clean oil in and run engine and drain it to help clean out residual diesel fuel and drain this oil into a clean pan and use the oil in a older vehicle as top up oil

It just cleans the oil passages it is a extra step but if your ocd or like clean engine oil it works to clean sludge

I have experimented putting 2 litres of new oil 1 litre of transmission fluid and 1 litre of diesel into a engine and running it for 30 minutes even driving it around the block then changing the oil and it really cleans out a engine it stopped the stuck valve noise on start up which had noise valve train noise on start up ...

[unclemikeb]

It is good to see a review like this.
I find it reassuring the cleaner is backed by Amsoil. I am certain they have more access to information on this subject than me. And expert information from engineers who study this their whole lives.

I will be purchasing this product soon.

An old guy who ran a small station back in the 1970's told me right before an oil change he would add one quart of transmission fluid to the oil. He would drain some out if he had to. He got the idea when someone showed him it would clean greasy oily hands. So he figured if it could clean the gunk off his hands, it could clean the same gunk inside the engine. He would then run the engine on short trips for a few days then change it. I started doing it every other oil change. Once my old Dodge had 60, 000 miles it used a wee bit of oil in 5, 000 miles so I just added whatever it was low. If it only took a half quart, okay.

It was doing the job because at 100, 000 miles I pulled the valve covers to install new gaskets and it was spotless in there. NO SLUDGE at all. At about 150, 000 miles the oil pan starting leaking so I removed it and I was amazed by how clean the pan was. Again NO SLUDGE. The van had about 190, 000 miles on it when I parked it and started using it for storing things. She starting rusting out the floors so I wasn't sure it was safe to drive. So the trans fluid cleaned the engine and did not shorten engine life because it ran perfect at 190, 000 and I wasn't using synthetic way back then. Had only slightly heard of it but it was way too expensive back then.

I live ten miles from the nearest city so the engine always got a good heat up before it was parked. That might have helped keep the engine clean but it was mostly the transmission fluid because I would check the oil on the dipstick and I could see it get darker in just 50 miles of driving after I added the trans fluid.

[datsuntoyy]

Adding a flush to clean oil. FINALLY a guy with a brain to do a real test. Kudos.
3:35 if you have a drill, drill a small (very small) hole in the bottom end of the filter. Just be quick pulling the drill back.
Turn the oil jut so the spout is up, not down. pours better.

[Kaylun_UO]

Good job. Im not surprised. I run amsoil in my 15 5.0. Im going to do this flush today before my oil change. Truck has almost 100k, got it with 50k and ran amsoil sig from day 1. I would like to think the amsoil oil has cleaned the engine alone over that time, but im doing the flush anyways, i figure it cant hurt and I plan on running this truck until the wheels fall off. Thanks for the time and doing this comparison. 👍

[mariohuerta]

Try to drain the new post flush oil to see if it'd still be dark because of the deposit on the oil pan that might be still present?

[uncrunch]

Why not skip the flush and just change the filter when it's clogged? Is there no way to detect when it's clogged via oil pressure checks?

[tarquineous]

Always put the fill cap back on, so the PCV system works correctly.

[bkyardmechanic]

The 1st oil change will always have crap in it because there's always dirt in some area's inside engine. Great effort and sure it did some good.

[joeblow]

Good to see you have the most important component of the flush. A Timmys.

[ronbaker]

I think you proved that the Amsoil flush is effective despite some minor issues with methodology. When you ran the engine at 6:50 there was obvious engine knocking. I am interested in what oil you finally put into the engine and if there was any obvious sound difference especially if your final oil was an Amsoil product.