Quote:
Originally Posted by winmutt
These weights the same for the 617 for synth?
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Yes, the CI-4 rated oil (5W40) is backward compatible with any vintage MB diesel engine. I recommend having an oil analysis done by Blackstone or any other lab to determine the optimum interval between changes since the recommended interval is probably very conservative for synthetic oils.
I know I felt uncomfortable about running the oil 10K miles between changes but the oil analysis I had done at 8K miles last time showed well below average contaminants and they recommended I try a longer interval next time, so I will shoot for 10K miles. My FSS says I can go 12K but I doubt I would ever stretch it that long.