Quote:
Originally Posted by Flavor 987S
I have just over 45,000 miles on my 987S. For most of the past 6 driving seasons, I've very successfully used Red Line 5W40 with Blackstone UOA's. Last year, prior to winter hibernation, I switched to Mobil 1's 5W50 (hard oil to find). It was just drained last week, after one driving season and about 6,400 miles. The UOA looks excellent, and I plan on using it another year.
If my UOA's continue to to be excellent (as expected) I plan to stay with the 5W50. If not, my pan was/is to try Motul.
I went with the Mobil 5W50 for these reasons:
1) Porsche approved
2) A 5W50 weight (I wanted a 50 weight)
3) Easier to obtain than Red Line (not shipping, I can pick up from a Mobil dist. in Elgin, IL)
4) About $6.75/quart
IMHO, the only way to justify your oil selection is with several data points from a UOA report.
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Just so I understand, you feel that 50 grade oil provides better lubrication at higher operating temperatures than 40W ? Also, some of what I've read suggests that there's a benefit to using 0-5W for initial start-up over the usual 10W . Does this make sense ?