Fmiser wrote: > If you expect to have to start your engine at temps near 0F (-20 C), > then the 0W-40 can give let you reliable start the engine at temps 10 > deg F (5 deg C) colder than 15W-40.
It *may* also decrease start-up wear. Thick oil takes longer to pump to the bearings, and especially up to the camshaft.
