what wieght sny oil does every one use?

 

I believe most are using 5W 40 in synthetic.

 

5w40 Rotella here.

 

5-40 for me, i did run 0-30 one winter

 

5w-40 Rotella Syn here as well.

 

5w-40 Rotella for me too

 

5w-40 mobile delvac here

 

5w-40 schaeffers 9000 here

 

15w-40 for me.

 

5W-40 Schaeffer's 9000 here, year round, for the last 2 years.

 

I've run the Schaeffer's 5W-40 series 9000 full synthetic and the synthetic blend 15W-40. Best oil analysis results I've had.

 

AMSOIL 15W30... I put on an AMSOIL bypass filter system as well... change oil once a year!

 

I use 5W40 Rotella T Syhtetic Oil too.

I love the stuff.

 

Just switched a second truck to 5W40 Rotella T two nights ago.

 

I've run 5w40 syn from Amsoil and am now running 5w40 from Schaeffers. Amsoil didn't run as well or as long as I had hoped it would, so I'm checking out the Schaeffer's 9000 series right now. I also plan to try out the Rotella-T 5w40 to get a nice 3-way comparison. Regardless, I'm sticking with the 5w40 year-round regardless of who comes out the winner for me.