Check the ratings in "that little circle" on the label. I think you will find that mobile 1 does have a "C" rating.
The C is the diesel rating the "S" (as in SJ) is the spark engine (gasoline)
rating. Not many of the modern, fuel
saving, oils have a diesel rating.
Eric Klobas
eklobas@earthlink.net
Sandy Noyes wrote:
> Cat -
>
> I am thinking more in terms of DelVac1 for the truck. It is the diesel
oil. Mobil1 is for gas engines. I have
> used Mobil1 for over 20 years and live it, too.