As far as Amsoil vs. Mobil-1 goes, at least they both are true synthetics. My Mobil-1 preference is due to real-world use in everything from aerospace to heavy industrial. Amsoil advertises its use by this racer or that one, but if you go to where the bottom line in industrial, agricultural and other industries is dictated in maintenance dollars then you'll see Mobil-1 in use. Plus it's much more readily available when you need it.![]()





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