My 2 cents would be the lighter the oil the more noise the chains will make,the pressure gauge normally doesn't read correctly and the pressure will drop more at idle. Whether use synthetics or conventional Hot weather like in Texas I use 20-50. John Hervey -----Original Message----- From: dmcnews@xxxxxxxxxxxxxxx [mailto:dmcnews@xxxxxxxxxxxxxxx]On Behalf Of Joseph Kuchan Sent: Thursday, August 04, 2005 10:30 AM To: dmcnews@xxxxxxxxxxxxxxx Subject: RE: [DML] Re: What motor oil to use. I "second" Dave's choice of Mobil1 15W-50. Actually, if you look at the detailed specs for that oil and other "competing" oils, you 'll see little difference in the "pour points" of the synthetic 15W-50 and most conventional 10W-30 and even 5W-30 oils. What does that mean? It means don't be too scared to use Mobil 1 15W-50 oil even in moderately low temps. Mobil1 15W-50 also excels at high temps. (As do some other oils, especially synthetics.) The SAE viscosity ratings of oils are AT BEST an extremely rough guide to the "flowability" of oils at various temps. My son has been using Mobil 1 15W-50 in his car and we recently had his motor on a stand with the valve covers and oil pan off. The parts we could inspect were absolutely immaculate. I am also convinced that synthetic oil is the way to go. -Joe Kuchan >Manual states 20W50 for hot weather. This sounds "heavy" but is not >unusual for Euro engines of that era. I've started using 15W50 Mobil 1 >(after doing a teardown on a 150K-mile BMW engine that had always run >Mobil 1 I was sold). Oil is like a religious argument - you'll get a >ton of opinions on this one, and unless you drive it 100K miles and >then tear it down, you'll never figure out who's right. > >I know many folks running 10W30 without issue. In any case I'm >convinced that full synthtetic is well worth the money. To address comments privately to the moderating team, please address: moderators@xxxxxxxxxxx For more info on the list, tech articles, cars for sale see www.dmcnews.com To search the archives or view files, log in at http://groups.yahoo.com/group/dmcnews Yahoo! Groups Links To address comments privately to the moderating team, please address: moderators@xxxxxxxxxxx For more info on the list, tech articles, cars for sale see www.dmcnews.com To search the archives or view files, log in at http://groups.yahoo.com/group/dmcnews Yahoo! Groups Links <*> To visit your group on the web, go to: http://groups.yahoo.com/group/dmcnews/ <*> To unsubscribe from this group, send an email to: dmcnews-unsubscribe@xxxxxxxxxxxxxxx <*> Your use of Yahoo! Groups is subject to: http://docs.yahoo.com/info/terms/