Changing to synthetic oil!!
#31
@dtmbinb Even at -20C my Oil pressure is fine with 10/40 Royal Purple HPS. There have been lots of reports ticking with 5 weight until the engines up to temp, regardless of outside temps. I suspect it just old tired engines, but it could be our type of oil pump too, no one uses eccentric gear pumps any more.
#33
I assume you are talking about on an old design motor like the Rover V8 due to the oil pump design? Plenty of high performance motors run 0w40. Porsche for one. Quality synthetics do in fact protect at start up, even in 0 or 5 weights.
#35
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