Been using for years. Switched way back from 5w 20 to 10w 30 because with the 5/20 went through a quart every 3 months, after the switch that usage stopped. Best oil on the market and I use it in all my vehicles, truck, car, lawn tractor, and all my boys use it as well. One son was told when his engine was inspected internally that it was the cleanest engine that mechanic had seen in his 25 years of work. We stand behind it 100%, and we tell all the people we know about it. Even some mechanics that have never heard of it, hard to believe, but true, lol...
By 
LAWRENCE, 
a 
Verified Buyer 
on 
August 16, 2021
If you are looking for top protection for your second biggest investment. There is no other product that meet your needs better the Signature Series Amsoil. My only choice back by data.
I use this in my 2010 half ton Silverado and my 2011 equinox. Compared to Mobil and other oils I’ve used in the past this one is the best one so far. Quiets up motor noise, solved my engine tick on the truck and lasts a lot longer. So far at a 7,000 mile oil change it looked great. Still waiting on lab analysis. Solid product.
Every thing I own running amzoil, that includes 3 cars 4 trucks 2 4wheelers, harley davidson flht, boat, and a crotch 🚀
Not to mention that I use the used oil I drain out in lawnmowers among other things that need to be lubricated 😋 just because even at 12,000 miles there is plenty life left in this product and is completely usable!!!!!
Bottom Line
Yes, I would recommend this to a friend.
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5 star rating
Only oil guaranteed to save my direct injected turbo motor!
By 
RustyCo, 
a 
Verified Buyer 
from 
Free America AZ 
on 
August 15, 2021
I found this oil after several years of finding nothing aftermarket that met KIA's specs for the direct injected turbo motor. KIA uses a synthetic blend which I will not use due to my years as an engine builder. No other major manufacturer met the specs except in high-mileage oil which I cannot use in newish cars. The 25K protection guarantee plus the once a year change convinced me to try it and although I change oil and filter every 5K I still like that buffer so this is the cheapest insurance I can get for an engine that usually blows up at 60K! I gladly pay the difference for this peace of mind.
Great for every engine! handles the cold when at -25° Handles the heat when it’s 90° Driven hard at the sand dunes. Never has a burnt oil smell during changes. 180k miles engine is very clean internally.
BEST motor oil ever used. Best protection, smoother operation and idle. Stays cleaner for longer milage (2500 miles and oil still looks new). I use to be a big fan of the other good oil with a funny color, but Amsoil seems better. If you want great protection, Amsoil is the one for you.
Amsoil had been the best oil that I've been using for years. It started with one vehicle. Eventually put Amsoil oil in all cars. This oil has helped keep engines running cooler, fuel efficient and more.
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