A less costly alterative to Delvac1 is the Rotela 5/40 synthetic. It is not really syn just highly refined dino that the gov said the could be marketed as syn. Its $12.94gl. at wolly word. Delvac1 is about 5 plus bucks a quart and a little harder to come by.
BTW Mobil truck and suv 5/40 is the same thing as delvac1

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