My modified Subaru makes over 100 hp per cylinder so I need a very stout oil. This stuff pours like water, but has a very high viscosity at high temps. It also has loads of zinc and phosphorus which makes it perfect for high horsepower applications, turbo engines, and american hot rods.
Previously used Mobile 1 for years, but the specifications changed over time and didn't meet the GM specs for the engine. I transitioned to Amsoil and the engine ran even quieter and I know it's getting the proper lubrications that GM intended for the DOHC LT5.
Wonderful oil for older engines that can use it. I routinely run it for years at a time in my tractor and pickup. Neither uses any oil.
Bottom Line
Yes, I would recommend this to a friend.
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5 star rating
Only Reliable Oil Left at Affordable Price
By 
Scott, 
a 
Verified Buyer 
from 
Las Vegas 
on 
October 15, 2018
There are no other decent high-quality 20W50 oil products around for this price. Cannot think of a better value, at least on West Coast. Engine runs just as dependably, even out of a tire slide, as when brand new.
The filler spout is too big to fit all of my bikes cars & trucks. Like the oil.
Bottom Line
Yes, I would recommend this to a friend.
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5 star rating
100% Satisfaction all the time
By 
XS, 
a 
Verified Buyer 
from 
Palm Beach, FL 
on 
March 28, 2018
I have never regretted the day I made the switch to AMSOIL products. I am currently using the 20W 50 Full Synthetic in my Race Engine 4AGE 20V Turbo Charged. Engine Runs way smoother, even the initial startup in the mornings is way quieter. I have recently Purchased there radiator Coolant and I am eager to have this installed. I am Happy, and Highly recommend AMSOIL Products to anyone who wants to protect there machinery, equipment or motor. A++ AMSOIL For LIFE......
I am using this oil in my 68 Charger. And I am very happy with the results.
Bottom Line
Yes, I would recommend this to a friend.
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5 star rating
Long time user.
By 
JimB, 
a 
Verified Buyer 
from 
Long Beach, CA 
on 
February 19, 2018
Have used Amsoil products (used to sell it) since 1974 in all of our better vehicles and farm equipment. With annual or semi-annual changes of engine oil, never an issue related to lubrication and sludge or varnish buildup is a thing of the past.
By 
Steve S., 
a 
Verified Buyer 
from 
Niagara-on-the-Lake, ON 
on 
January 17, 2018
Made the switch from conventional oil to Amsoil and appreciate the quicker startup, better throttle response & quieter engine operation on my 94' Discovery. 340K km on the clock & looking forward many more with Amsoil. Thanks for a great product & service!
This oil has a very strong cleaning aspect. When I drained the oil the first time I used it in a motorcycle with 17000 miles on it, it came out looking like thick almost gloppy molasses. Very black and quite thick. Subsequent oil changes have resulted in the oil coming out much cleaner. So much so that I can see light through the stream of oil as it is draining from the engine. I recently removed a side cover to inspect the clutch plates. The inside of the engine is clean like it was new. I'm very happy with this product.
Bottom Line
Yes, I would recommend this to a friend.
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5 star rating
Premium Protection 20W-50 Synthetic Motor Oil
By 
mac, 
a 
Verified Buyer 
from 
Fort Worth.Texas 
on 
August 09, 2017
I am using this oil in my 95 GMC Sierra SLE. with a V8 5 litre. The oil makes the engine run smoother and quieter. Gas mileage seems better. The gas needle doesn't drop as quickly. I have been using it for 2 months. so far no leaks, no oil consumption. Acceleration is good.
I run AMSOIL 10W/40 in both vehicles a 2006 Tundra Limited, a 2012 Dodge Caravan and my John Deer 300X Riding mower and in every vehicle I have owned over the past 40 years. When 50w AVOIL was available I ran it in my 1977 Cessna 172N.
Not the cheapest, just the best. After tearing down my motor after 250hr for rebuild/refresh, my rod, cam, and crank bearings still looked new. Keep in mind this isn't a pampered motor. It gets run hard, yet the rebuild seemed completely unnecessary.
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