oil for 85300D

Peter~
What are you talking about M-B dosent recommend 10W-40 in its diesels? I read my owners manual like a bible, and it says 15W-40 in temps above 24 F and 10W-40 if temps go lower. Ive been using 15W-40 up until my last change and used 10W-40 for the 1st time and think its doing a great job. Years ago GM thought that 15and 10W-40 motor oils were not effective because of the large range and the additives needed to create this greater range of temp viscosity. So now they recommend 5 and 10W-30.
What might be fine for GM is not for M-B however.
Im sticking to my owner manual for my 300D Turbo.

15W-40 for summer
10W-40 for winter

[rbauman]

Reread Dennis' earlier comments! Your manual is based on using dino oils. Synthetics have an ability to give greater thickness at high temperature ranges, thus a dino 40 is similar, but not better than, a high quality synthetic 30. Also, they provide the thinness at cold levels, thus a dino 10 is exceeded by a synthetic 15. Therefore, synthetic 10-30 would act like a dino 5-40. Does this read too complicated? Roger ( I would add my belief in Redline Oils to the Amsoil, Mobil, Delvac Oils)

Thanks Roger
I may just try a synthetic oil next oil change.
15W-30 i guess it would be.
brett