Product Reviewed: Extended Life 10W-40 Synthetic Motor Oil (XLO)
Current Rating: 4.95 out of 5 stars
Votes & Reviews: 19 vote(s) and 306 user reviews.
Reviewed by Mark: 
Use this in my old Chevy 454 powered motorhome. This motor really works hard and gets Hot. Oil pressure stays up on hottest days and no leaks or oil burning. It's the best protection for my motor that
I can find.
Reviewed by BogusRacing:
Amsoil 10w-40 in my F150 with 200K miles in her and still runs like new
Reviewed by n/a:
Amsoil has been the only choice in lubricants since 1985, what else needs saying? Multiple BMW motorcycles, my wife's 2000 F150 with many miles, a couple of Suzuki Sidekicks, both high mileage with routine maintenance only. Enough to convince even those with little automotive knowledge.
Reviewed by DEREK:
This was purchased for a co-worker. He spoke to me about using the products and I explain how there was no better in the market. He is very happy and I feel will be returning for all his lubricate needs.
Reviewed by John C:
I am 71 years old in my second childhood. I have used every kind of oil in my life time. I personally will never use any other oil in my special car other than AMS. I bought a 2013 SI Honda Civic and I put a supercharger, different exhaust and had it dyno tuned and much more. Results over 300 HP to the wheel. I fell safe using this oil up to 6000 miles but I change at 30% not 15%. If you use this oil in your car you will never change to any other. I guarantee that.
Canada
United States
nothing but the best
I have been using Amsoil products for over twenty five years in all my vehicles and have never had a problem related to poor lubrication.I have never purchased a new car in my life and routinely run up over 200,000 miles on whatever I'm driving.I think that say's it all. Frank