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.
Bottom Line
Yes, I would recommend this to a friend.
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5 star rating
Makes Changes Quick, and More Effective
By 
ROBERT, 
a 
Verified Buyer 
from 
Augusta GA 
on 
February 02, 2025
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.
Bottom Line
Yes, I would recommend this to a friend.
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5 star rating
Worked Great on my LS7
By 
Samantha, 
a 
Verified Buyer 
on 
January 28, 2025
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.
Since using the AMSoil engine flush our vehicles run smoother and have resorted power. I highly recommend this before every or at least every other oil change. I can see when looking inside the crankcase a clean surface. Excellent product.
Very impressed how this product cleans the engine and allows the dirty fluid to quickly drain back to the pan for draining. Just follow the directions and again fill with new Signature series oil. Your engine will thank you with it's performance.
Bottom Line
Yes, I would recommend this to a friend.
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5 star rating
Flushing the dirt away
By 
ROCHER, 
a 
Verified Buyer 
on 
November 23, 2024
Sinds using this product all engines that had sludge ( minor ) clean out good
Bottom Line
Yes, I would recommend this to a friend.
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5 star rating
Removes Sludge
By 
JACQUELINE, 
a 
Verified Buyer 
from 
New Jersey 
on 
November 21, 2024
I use the stuff in my car and I immediately saw the difference in my engine it really helped it get cleaner and run smoother
Bottom Line
Yes, I would recommend this to a friend.
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5 star rating
oil comes out thin and very dirty
By 
RYAN, 
a 
Verified Buyer 
on 
November 05, 2024
Much more efficient then a standard oil change. Have not used in transmission.
Bottom Line
Yes, I would recommend this to a friend.
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5 star rating
Engine flush
By 
MELVIN, 
a 
Verified Buyer 
from 
Fort Macleod  
on 
October 25, 2024
Really frees up the engine gets better fuel mileage,runs cooler you can hardly here the engine running. Melvin shingar
Every time I changed the oil in my diesel, the oil would be black instantly. Even after I did an egr weight reduction procedure. I ran a bottle this as it said to, changed the oil and have about 1500km on the new oil. It’s still clean after switching to sig series max duty.
I’m sold on this and AMSOIL.
Bottom Line
Yes, I would recommend this to a friend.
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3 star rating
did not use
By 
RICHARD, 
a 
Verified Buyer 
from 
Fall River ma 
on 
July 01, 2024
I bought it but did not use it, my car has a lot of miles on it and was afraid that I would open a can of worms.
I decided to flush out the Penzoil that I would use on my dodge charger 392, and added the AMSOIL signature series. Engine oil life since oil change and flush is at 80% and still looks golden.
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