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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.
I am a firm believer in Amsoil. This oil helped me out with my 75 chevy 350. It took away an engine tick. It also runs and idles a lot smoother. Excellent product.
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5 star rating
Premium Protection 20W-50 Synthetic Motor Oil , high zinc
By 
racer270, 
a 
Verified Buyer 
from 
santa ysabel ca. 
on 
April 30, 2017
i love the product , i drive less then 12,000 miles and so i have been changing my oil once a year , since 2007 when i overhauled my dodge diesel engine. in fact it's cheaper then running Dino oil ,.. and changing it every 3,000 ~ 4,000 miles. thank you for the grate product. GA.
I've been using this oil in my drift cars for years now, and have gotten to tear a couple motors down for rebuilds ( due to low compression) and got the opportunity to see that the oil has Done it's job! It kept the engin clean inside, and protected the bearing like it was supose to!
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5 star rating
2013 Toyota RAV4
By 
Bobby, 
a 
Verified Buyer 
from 
Newport Beach, Ca 
on 
March 06, 2017
My application is a 2013 Toyota RAV4 with 15k miles. I use 10w-40 Amsoil and change just once a year since I normally drive about 3800 miles a year anyway using Amsoil Full Synthetic.. I feel more confident using this and changing it myself the first several years as opposed to letting Toyota change it for FREE with regular oil every 6 months. Basically I can do it myself once a year and still save time from waiting around at a stealership lobby and have confidence I will not sludge up ever with better protection. Not to mention I know I do it right and tighten everything back up. I personally had some bad experiances in the past and do not trust them working on my car since I bought it new. One time the spark plugs were apparently never tightened as an example on another new car we purchased during a service.
It's a great product, I even get,an extra 2 miles per gallon which helps a lot
Bottom Line
Yes, I would recommend this to a friend.
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5 star rating
Great oil for older big block engines
By 
PAUL, 
a 
Verified Buyer 
on 
December 24, 2016
Use this oil in my big block mercury marine 454 inboard engines. Makes them run smooth and quiet. there is never any problem starting these engines, even after being stored for the long Canadian winter. The oil also help performance with at least a 20 hp power increase!
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5 star rating
For my 90 YJ
By 
Slick mike, 
a 
Verified Buyer 
from 
Washington state 
on 
August 30, 2016
I'm 60 years old and have used every possible lubrication known to man, Amsoil is by far the best.
I use the Amsoil high zinc formula in a high reving 4cyl application . The oil pressure and temp are never an issue while on the track and I like the extra protection that the zinc provides for the camshaft and shim buckets.
I use this product in my work van with an oil bypass filter along with my stock oil filter, my van has over 340,000 miles and has had the oil bypass filter since it was new and I truly believe that Amsoil has kept me on the road this long.
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