Are you running full synthetic oil? If so, go to a summer (dunno what climate you are in now) weight of 10W-40. With a synthetic, I understand that the percentage of the quart devoted to additives is less than with dino oil.
I use 5W-40 all year in my 1997 965. Why the 5W? For the 965, the hydraulic lifters pump up very quickly, ending clatter sooner. Also, the viscosity rises from 5W fairly fast.
A faster pump-up will put the oil light out quicker. It would be nice to have an oil pressure gauge, though. If you find one, eBay or a junk yard, be sure to get all the sender plumbing.
Good Luck,
Bob
:>)
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