Interesting post Jeff. I stock Valvoline bulk 5w20, 5w30, 10w30 and qts of Valvoline 10w40 plus gallons of 15w40 fleet for diesels. We also keep 6 qts of Valvoline 5w30 synthetic on hand. I have other oils that are requested, which is very few, sent in by the ... Login to read more.