Quote:
Originally Posted by Johnny Danger
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 ?
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I can tell from the UOA that the 50 weight is doing it's job, because the zinc and phosphorus are lower than Red Line's content. And wear metals went down with a longer drain interval.
I think a 5 weight is better than a 0 weight because it narrows the gap to 50 and keeps the range tighter. A 0 weight would be good for a very cold climate (when my cars are stored). There are no 10 weight oils that at Porsche approved for the 986/987/996/997.
My car sees a LOT of +6,000 RPM's (shifting).
I'll post my cumulative UOA from the past 4 oil changes one day this week, when I get a chance, and you'll see the data.
Without the UOA's I'd never know that the Red Line 5W40 was a great oil, and the Mobil 5W50 appears to be as good or better.
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