Thank you all for your replies to my first post. Changed my 15W 40 Rotella oil today for the Mobile synthetic 0W 40. Noticed immediately my idle oil pressure hovers at 2 bars instead of the normal 3-4, but rises to the normal 4-5 bars once the car is rolling. Will this lower oil pressure at idle...
Wow, thanks for the responses. I just wasn't sure if a 40 weight synthetic would provide the layer of protection in hot weather that a 50 weight dino would. I've heard a lot of early wear problems with those motors from guys who run thinner weight oils.
Spring is coming up, and I'm planning on changing the oil in my 1986 Porsche 944 Turbo from its winter 15W 40 weight to its summer 20W 50 weight. However, tody I saw the 2009 Porsche recommended oil list where Porsche now recommends synthetic 0w 40 for all it's cars, dating back to 1984. 0W 40...