Oil questions

[CHMLEON]

Hmm, I didn't get that take from it...I think Mobil 1 is still o.k.

Did I miss something?

Last time that I changed my oil, Mobil 1 Extended Performance 10W-30 (Synthetic), I noticed that the API logo was on the bottle.

I am still trying to decide what oil to switch to, since my 3000 mile mark is coming up soon.

[Formula Z]

royal purple ftw

[Keego Ridah]

i usually run 10w30 royal purple in my car, i switched to Mobil 5w30 once and my valvetrain sounded horrible, i tore my whole block apart and then switched to Royal Purple no more noise, i'll never switch again

[JoeliusZ28]

the 160 t stat makes it run rich (it makes the computer stay in warm up mode and dump more gas) I run a standard tstat in my car and it stays 195 at idle and cruise in the 100 degree heat here in Alabama, and gets 24 mpg with a supercharger (when it had a 160 stat it got 18 mpg and run around the 180 mark)

i would imagine i can fix this with a tune right?

[CHMLEON]

royal purple ftw

Even Royal Purple's standard motor oil says that it is API certified.