Which oil to use? - PeachParts Mercedes-Benz Forum

bnzpwr · #1 08-06-2008, 02:27 AM

Quote:

Originally Posted by ForcedInduction

No, 10,000miles is far to long to go on a non-synthetic oil.

3-5,000k miles is fine for dino oil and you can push up to 8,000 if you use a good quality synthetic (not rotella).

The oil brand does not matter. What matters is that it has a Cx rating on the bottle. Most 15W-40 and 5W-40 oils have that rating.
http://www.calsci.com/motorcycleinfo/API.html
http://www.api.org/certifications/engineoil/categories/upload/English_Oil_Guide.pdf

If you want to know what brand of oil to use, search the forum. Its a fiercely opinionated subject and there is no bad oil as long as it meets the C rating.

Thanks for the links. I am not really picky about which brand to use. frankly I dont have much of a brand loyalty (except MB of course) but rather want to use what is most practical and economic.

I hope I dont sound too stupid, but I really couldnt get much info out of those charts other than the fact that there are many types of diesel motor oils.

Should I be using 5w-40? 15w-40? 20-50? Orrrrrr...are any of these fine as long as it has one of the C(x-#) things printed on the bottle?

#2 08-06-2008, 02:33 AM

15W-40 is most common for non-synthetic diesel oils.
5W-40 is what most synthetic oils are.

If an oil is one of those two weights its most likely diesel rated.