Red Line did the test so of course the're gonna say their better than Amsoil
Red Line Tests only focus on which oil burns cleaner Difference 1%
Red Line tests do not show which oil has better wear protection - Amsoil IMO
Both Red Line and Amsoil are Made in USA and both are about the same in all aspects
Red Line Tests only focus on which oil burns cleaner Difference 1%
Red Line tests do not show which oil has better wear protection - Amsoil IMO
Both Red Line and Amsoil are Made in USA and both are about the same in all aspects