Bobbo,

10W30 is strictly a GASOLINE Oil.
(Since you've neither listed your MB Type in your "Signature" or Public Info,
we've No idea what you're Driving)
[It MAY be a Petrol/Benzine/Gasser MB,since you're posting on the "Tech"]

Certain Diesel Rated Oils (5W40) are The Preferred Lubricant for both Diesel AND Gasoline Applications.
I.E. Mobil's Delvac 1, Redline's 5W40

'Where you be in Georgia (AKA,Who is the Dealer?) ?

__________________
'84 300SD sold
124.128