I don't think Mobil one is rated for diesels I believe that is the gas motor
formulation. MOBIL DELVAC 1300 SAE 15W-40 has the following API
CG-4,CF-4,CF-2,CF/SH DOUBLE CUMMINS NTC-400 and meets the requirements for
diesels. I run it in my Dodge Ram 3500 with the Cummins and have been very happy
Mobil calls it the million mile oil.

HHamp5246@aol.com wrote:

> In a message dated 6/9/99 8:38:19 AM Eastern Daylight Time,
> cjohnson@maine.edu writes:
>
> << Is it and option to use Synthetic oil in a Chev. Diesel eng.? and at the
> same time I want to ask the question about brand names of diesel oil (Shell
> rotola) or (Oilsum brand) does one over the other make a difference. >>
>
> I was thinking I would use Mobil One in the burb. I saw it at Wally World
> for approx 4.00 a quart.............. the good news is my local quick lube
> place said they would put it in for me..... for a 10.00 charge, which
> includes all the other checks they do...air in tires, window washer fluid,
> check transmission etc... the biggest plus is they dispose of the old
> oil....... oh, and *I* don't have to change the oil. (c:
>
> Does anyone know any reason why I shouldn't use Mobil One?
>
> Hunter