What weight of engine oil

[CMSGT]

Whats the recommended engine oil for the Cummins NHC 250 in winter months? I live in the lower elevations of Utah so getting down to zero would be a rarity. In my powerstroke per the dealer I use 15W40 in summer and 10W30 in the winter. Any advice is appreciated.

 

[skidder]

well i live in nw conn. an it gets down bast O an i don't have a problem. i have ben using AMSOIL 15w 40 sea.3000 for years in all my equipment an swear by it scott

 

[wreckerman893]

I reccomend Shell Rotella in the proper weight for your climate....cost a little more but engines are expensive.

 

[reallybigboat]

Gentlemen:

So what weight engine oil are you running in your NHC 250 Cummins? 30W as the data plate and LO indicate, or as I would be inclined to do, 15W-40 Rotella T? I really hate to run anything different than the data plate and LO indicate, but I always run 15W-40 Rotella in my diesel vehicles and equipment. I am in a relatively moderate climate (Dallas, Texas), so 30W will work.

I don't see a definitive answer on this forum and am getting ready for the first oil and filter change in the NHC 250.

Anyone, anyone...?

Thanks!

 

[Billy Bobbed]

15W40 Delvac,Rotlella,NAPA its all good.Never had a problem yet

 

[WillWagner]

Cummins has ALWAYS recommended 15W40. Your flavor is up to you.

 

[jwaller]

I run the synthetic rotella. I think it's 15-30.

 

[nk14zp]

15w/40

 

[papabear]

We use 15/40 in everything here...civilian and military...diesel and gassers, even the little jeepies!
Never had a problem...never lost an engine...summer or winter. Of course we dont get many zero days in southwest GA.