Quote:
Originally Posted by Will_w202
.....What's the skinny on the oil computer and the 229.51 5w40 over 13k miles?
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You can use the 229.51 synthetic if you want to, but 229.5 is all you really need. The 229.51 is the recommended oil for the OM642 V-6 diesel engine. The 229.51 is needed to protect the diesel particulate filter from clogging up.