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what type of oil do I need to use for my C23O with 285k on it on 1998 Mercedes-Benz C230

what type of oil do I need to use for my C23O with 285k on it

Asked by for the 1998 Mercedes-Benz C230
what type of oil have you been using all along???
factory spec is MB 229.3 5W40, 5W30, 0W30 or 0W40 in
full synthetic
3 more answers
5w-30 fully synthetic oil. always stick with what the manufacture recomended.
use 20-50 good for tight engine compartment, synthetic are for newer models.
Mobile 0w-40 synthetic