There are lots of posts about oil in the archives (LOTS... as I recall), but I'll "third" Dave and Joe's comments. I've been using the 15-50 Mobil 1 in 1063 for almost 30,000 miles. I change it every 6,000 miles and it drains a transparent brown. Definitely the cleanest oil I've ever seen drained from an engine. -And the PRV doesn't use a drop. I don't know if that says more about the oil or the PRV (or the Purflux filter), but I'm sticking with all three! Jake Kamphoefner PS. --> My local Walmart carries Mobil 1 15-50 in a 5-quart jug, making that 7-quart fill a snap. Joseph Kuchan <josephkuchan@xxxxxxxxxxx> wrote: 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.) <snip> [Non-text portions of this message have been removed] 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/