OH--no! Not another oil question! Yes it is--but what are you cold weather die hard guys running for oil in the winter--below 40°F--riding conditions? I just had lunch with an Amsoil dealer who gave me a couple quarts of 0W40 and a couple of quarts of 10W40 to try out. Both are mototcycle oils for 4 stokes without friction modifiers. I have Mobil 1 red cap 15W50 in the bike now--and I can't get it started (but it was like 8°F and I didn't want to ride anyway!). He says I can go longer between changes and the bike will start and run better. He runs a 500cc drag bike (13.01 ET heading to the 12's!), was a former MX'er, and drives an '88 Ford F-150 with 280,000 miles on it. I am thinking of putting in the 0W40 now and swicthing to to the 10W40 next oil change--which will be like June or July. Any one running either of these oils? I think the 15W50 Mobil is good stuff--but a bit too thick for half the year here in Michigan. I know this all goes against my earlier posts of using cheap oil and change often, but I can't find decent cold weather oil without friction modifiers, unless I go with mineral 10W40. I would like to get a 5W30 but eveything I find has friction modifiers in it. On another note--I think I am going to switch to the Amsoil oil filters and oil for my vehicle. Based on their recommended filter and oil change intervals for the year, I will save over $50.00 a year--enough to put my wife's car on the plan and save another $50.00 or so. And yet another note--anyone run that 100:1 Amsoil 2 stroke oil in one of their smokers? What about the other Amsoil 2 stroke premix oils? Any good?