Originally Posted By: ExMachina
Originally Posted By: donnyj08
it wont really matter at temps seen in Omaha. The oil pump doesn't care about the thickness of the oil, and it will pump the same amount of volume. The difference in Viscosity between 0w30 and 0w40 at 0 Deg is not enough to phase the oil pump or prohibit lubrication to the top end.
0w40 isn't too thick or excessive by any means. OP if it were my vehicle i would run a 5w40 or 0w40 that meets the 502.00 spec as your car calls for. As mentioned the spec has a higher HTHS rating than your typical 0/5w30 GF-5 SN oil.
I realize your car isn't a turbo model and is a standard N/A 2.5l, however the recommended VW spec is still the recommended spec. M1 0w40 is hard to beat for the price and availability.
Oh, I forgot, Omaha doesn't get cold in the winter!
Right. We believe that.
There is a lot of misunderstanding about
just being able to pump, and actually
getting the oil to splash/flow on cylinder walls, chains, valvetrain, some parts more susceptible to cold weather flow issues than others. A thinner oil cold will help, just the truth. Sure the engine won't explode either way, but we're trying to
minimize wear, not
maximize it.
And again, about HTHS, its there to lower wear. The dexos1 speced oils in the near-3.0 category already lower wear much more than VW 502.00 (HTHS 3.5) calls for, so no problem there.
I don't entirely disagree with you. You are correct in the fact that a dexos 5w30 or 0w30 would flow better when "cold" compared to a 0w40.
The real issue is the relativity of the cold. I know Omaha is cold, however the average January temperature in Omaha is 12 degrees F. While it is cold, it isn't anywhere near cold enough to stress an oil like M1 0w40. at 12F mobil 1 0w40 would still be able to splash and flow well.
If we start talking about -20F or colder then yes i would look into something like 0w30 mobil.
below is a link to see average temps in Omaha, NE
http://www.visitomaha.com/visitors/weather/#.VZVP6_lViko