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Yes there are oil squirters. Perhaps they get plugged? Or as you suggest do not pass sufficient oil in low temps.
The conventional wisdom on the Forums seems to be that the oil for cold climates should be 0w-30w or thereabouts. Many people seem to use 15-50 year round -even in cold weather.
A quote from THE authority on this subject who kindly shared his experience:
"The factory did not allow for adequate running clearance in cold temperatures with these engines, especially those that have forged pistons. After being just started the piston expands faster than the cylinder and the clearance becomes too tight, which makes it impossible to gain boundary layer lubrication from the engine oil. To make it worse, the oil is still cold and thick when this occurs as its only seconds after cold start up.
Cayenne engines have the same issue and its so bad that a couple of Canadian dealerships send us their engines rather than installing a crate engine that will just do the same thing all over again. One Cayenne owner has had this occur 4 times!
We have done much more of our testing in super cold, than in super hot. Next month we'll have a test car start a 20,000 mile loop of N America. I wish he was on the road now, taking advantage of all these awesome opportunities to see single digits and below zero values. Then we'll take it apart and see how it looks. The record on one of our test engines is 5,200 cold start cycles.
If you have to drive in the cold try to keep the car stored in a warm environment and when driving down stay parked so long that the engine completely cools down!
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Jake Raby"
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2001 Boxster S
Engineers muse
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