oil weight in So. California

Awesome, thanks! Then that's what I'm going to go with. 15 is thin enough for starting even on chilly (50 degree) mornings and thick enough at hot running temps. This is the grade my father-in-law had suggested as well.

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An added benefit of the 15-40 is that its a common diesel grade. Diesel oils have more detergents and a higher zinc level than the modern blends, mostly due to the fact that the zinc would be bad for a modern O2 sensor. The higher zinc is very good for the cam lifters etc. I run Rotella in my engines due to this. You may also wish to consider the 5-40 synthetic. It is a very reasonably priced synthetic oil.

don't call me "dude" i won't date you..... you also never said you didn't drive the car when temps were below zero, but you are just being argumentative now.... the car may start and "run" quite nicely(amazingly a lot of folks think a sloppy running car "runs" well..)...newsflash you won't see bearing wear by raising the hood....good luck with it...you may be needing it....LOL...

that is exactly what 20-50 means...next time you are out in zero weather open a quart of it and dump it out...dress warm it'll take quite some time...