Quote:
Originally Posted by Scott98
I would look for somthing that has the ZDDP additive package. Our engines are flat-tappet engines and oil without this package accelerates camshaft wear. I am currently switching all of my vehicles over to Redline because of this.
Scott
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Good point, thats why I switched to Amsoil 15w40, Redline is probably a bit better though.
20w50 is to thick unless its for a racing engine. Go with something that has a 40 as the second number.
As far as when to change it, 617's put a lot of soot in the oil. You really shouldn't go much beyond 5k no matter what oil you use.
Rotella 5w40 is a great oil for the money, I used it in my 300SD.