There shouldn't be a problem with using that lube, especially since it stays at the 85 thickness all the time. It just lubricates like a 140 whern it's hot. That's the same thing a 10W30 oil does. It doesn't physically thicken as it heats up, it just hangs on and lubricates like a thicker viscosity oil when the engine is up to normal temperature. Thw "W" in the designation means "Winter", indicating the flow rate is checked at 0 degrees Farinheit. Your 85W140 will flow like a SAE 85 oil all the time, and lubricate like a SAE 140 at high temperature. Best of both worlds!
Jerry

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