Amsoil uses GTL? That's going to let some air out of the balloon.Cost is the concern across the board for any brand. You have to make the oil as balanced as possible given all the options available. Amsoil uses GTL. You could make a PAO based oil with a dated additive system by loading up on cheap ZDP or boosting xyz. Doesn't mean it's better.
Cast ye your pearls before swine.
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