Originally Posted by ScraggleRock

You're all severely misinformed. Your weight of oil is dependent on the temperature of the environment in which you drive it. I ran 20w50 conventional in my G for about 2.5 yrs before I switched to syn blend. Guess what happened..? Nothing. You get a little better gas mileage with thinner oil, but more compression with thick.

There is no "one size fits all" oil, and it should be dependent on your specific situation. I've run everything from 5w20 synthetic in my old Honda to straight 40w in my old dodge truck, and 20w50 in multiple cars.

Thicker oil = more cushion for the pushin, baby. Just not to be used in cold.

Originally Posted by yosip1115

The manufacturer recommends 5w-20 and thicker oil is not good, that is why 90% of engine wear occurs at cold startups. This is a great read:

http://www.bobistheoilguy.com/motor-oil-101/

If you can't get good quality off the shelf synthetic oil out there like penzoil (not m1) for peace of mind I would go to the dealer to buy my fluids. If those are out there... Never been. I used to buy AMS oil online ahead of time, it really was convenient to have it waiting at my door with a nice filter too. Don't skimp on your filter, I run Bosch, K&N, AMS, or OEM.