what is the best oil weight to go with in our cars here in the houston area?

 

I run Royal Purple 10w30.

 

10w30 is good, but you could do 5w30 too.

 

Mobil 1 synthetic 10W30 is what I'm runnin

 

I'm running the 5w-30 german castrol oil

 

Ive ran 5w 30 mobile 1, 5w30 amsoil, and 0w30 amsoil which is in my car right now...

 

Right now its M1 5W30 in the car, Ive ran their 15W50 performance driving formula and after 3k miles had like no oil consumption.

 

patman patman patman....

 

that guy knows his ****

 

We just put in Royal Purple for the first time with our last oil change -- 5W30 (switching from Mobil 1).

 

I've always run Royal Purple 5W 30 in my car.

 

If you don't buy your Amsoil from a regular dealer, let me know because I'm an Amsoil dealer and I do some special pricing for LS1TECH members and can have it shipped right to your door. If you want more info, feel free to shoot me a PM.

 

Royal Purple 10w30 for the past 2 years on both of my Z28s.

 

mobile 1 10w30

 

Royal Purple 10W 30 in the engine, Royal Purple in the Trans, and Royal Purple in the rearend.

 

I am really curious about this. I have forgoten what the numbers really mean. My auto mechanics teacher in highschool (Cy Fair) told me but that was years ago. I think it was something like 10W (minus 10 winter) and 30 was the rating of the viscosity, which would mean that is could flow at -10 degrees. Some one let me know because i could be totally wrong.

 

mobil 1 10w30 or royal purple 10w30

 

Same here.

 

where did you houston guys find the german castrol? i'm gonna change my oil today, and was gonna go out hunting for it.

 

Autozone's the only place i could find mine.