Big Blue
Well-Known Member
Just curious, what is your reasoning/logic behind this "robust blend" of yours? Don't worry I have no intention of playing petrochemist on my truck.My blend is equal parts (2 quarts each) a gas station's 5w30, Castrol Edge 5w30, and a certain brand that starts with A and ends with soil 0w40. I would name the gas station but they seem to have discontinued their oil products and frankly I want it all to myself.
Straight 5w40 should keep your shear rates in check, but cold flow and MPG will probably be slightly affected. It is also difficult to find API SP or SN Plus rated 5w40.
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