What oil to use

[adavis11]

Its time for my first oil change in my 7.3 powerstroke. The dealership put the motorcraft oil in it when I bought it, but I am not sure what to put in it now. Should I stick with a regular rotella T or go with a synthetic, and what weight should I use.

[mcflan]

5w40 synthetic for summer.

People are using Amsoil and Rotella T6

[adavis11]

what should I run for the winter

[ToMang07]

Agreed: Rotella T6 or if you want to spend the money AMSOIL.

I am running Amsoil CJ-4 15/40 @10K intervals and LOVE it.

If you don't want to go the synthetic route, Delvac is supposed to be a great dino oil.

[ToMang07]

Originally Posted by adavis11

what should I run for the winter

Synthetic.

It will start easier and run better in the cold. I have NO problem cold-starting at -25*.

[adavis11]

Do I need to run a different weight for the winter than what I run in the summer?

[ToMang07]

Originally Posted by adavis11

Do I need to run a different weight for the winter than what I run in the summer?

Not really. I run the 15/40 all year... but it's synthetic so it doesn't thicken up like the dino does.

[adavis11]

The rotella t6 is a 5w 40, is that ok to run all year or do I need to run a 15/40 weight?

[ToMang07]

Originally Posted by adavis11

The rotella t6 is a 5w 40, is that ok to run all year or do I need to run a 15/40 weight?

Its fine... I would guess 75% of the people on this forum use it.

[adavis11]

Good deal thanks for all the help.