Hey guys im new to this forum and i was wondering what viscosity i should use for my 1995 Mercedes Benz C280. It has 150,000 miles on it. 2.8L engine. And i was also wondering if i should use that Castrol High Mileage oil. Thanks!

What climate? What does the manual say? What problems, if any, are you trying to fix?

Chingy,

150,000 miles almost almost quarter million kilometer and that is a lot of mileage.For old engines Castrol recommended GP Multigrade a 20w/50 oil. I wonder if it is still available now a days.

If you are not a very cold climate SAE 20w/40 viscometrics should be a good bet, for fairly cold climate suggest 15w/40. Castrol GTX and its variants like Magnatec should a good choice.

Hussam Adeni

From the chek chart:
1999-92 All
all temperatures 5w-40, 5w-50
above 5F(15C), 15w-40, 15w-50
above -4F(20C), 10w-40, 10w-50, 10w-60
-4 to 50F(-20 to 10C), 10w-30
Below 25F(-5C), 5w-30
Diesel engine oil will give you a more robust additive package. Follow the owners manual for your API/GF specification. If you are burning oil, bump up the viscosity.