change oil

[socalgold]

I looked and didn't see this. I change the oil in my gas engines to the synthetic oils. I have 170,000 on my F350 7.3 and want to change it also. Is it Ok? is there a special synthetic to use? Nobody has had any problems going to the new oils have they?
Thanks
Lee

[vitalidle]

No not at all. I run 5w-40 rotella synthetic right now. You can run any diesel rated synthetic that meets CI-4 specs

[Dirk]

I thought we were at CJ-4 now?

[vitalidle]

Yeah thats for 2007 and newer have to run that spec. Its backwards compatible with older diesels

[socalgold]

Thanks guys, I went to this link and got totally confused.
Car Bibles : The Engine Oil Bible
I'm only getting 13 mpg mt or loaded, is there a way to get more mpg without too much loss of power?

[lifewitlooie]

Originally Posted by socalgold

Thanks guys, I went to this link and got totally confused.
Car Bibles : The Engine Oil Bible
I'm only getting 13 mpg mt or loaded, is there a way to get more mpg without too much loss of power?

Search that question in the previous posts or start a new thread. But I would search the posts, theres tons of Info already out there to read but If you dont want to. Start a new post and everyone will chime in