that's exactly what I want to find out! if you look on line AMSOIL is the best oil out there,but yet all the testing you'll find they are on a AMSOIL web site;Kool aid getcho Kool aid. :shaking:
Why would you buy Amsoil online when if you went door to door every 10th home with a garage is an "Amsoil Dealer" and he'll probably sell it to your for a discount.
Bottom line is any synthetic is better than any petroleum based oil.
Amsoil is a Multi-level Marketing company and has been for over 40 years. Over that time, there have been enough Amsoil salesman and "independant dealers" swearing to thier neighbors and buddys about it's performance to create quite a following. Talk to any Amway, Avon, Melaluca, or Herbalife sales reps and they will be able to provide you with countless testimonials and scientific proof and especially independant laboratory tests that conclude thier product to be superior over all others.
Is Amsoil the best oil made? No. Research synthetic base stocks. Amsoil uses polyalphaolefin or PAO which is an API class IV synthetic base. Ester is a API class V synthetic base that surpasses PAO's protection and durability qualities. The process is much more expensive than that of the PAO and only esters are durable enough to withstand the rigors of jet engine operation and they are also used in racing and high performance cars.(My experience all comes from the world of motocross and Motul and Redline come to mind)
Is Amsoil a good, reasonably priced full synthetic? Yes.
I am personally not a fan of Amsoil and it annoys me when people blurt out, "It's the best there is!" usually based on what thier neighbor who sells furnature by day and Amsoil on the weekend tells them.