0W20

[firemachine69]

Originally Posted by daf62757

I don't know if the price difference between Amsoil and Mobile 1 is worth the difference. Can anyone explain why the Amsoil is worth so much more?

Almost all of the AMSoil line-up is "true" synthetic (commonly referred to as 'group 4'), Mobil 1 is an extremely hydrocracked dyno oil (referred to as group 3 or 3), meaning not "truly" synthetic in that sense, but acceptable by the governments definitions.