Quote:
Originally Posted by JamboT
I agree, I think the oil control ring is a problem. I suspect that once it gets clogged, you're then burning oil (small amounts), in my case it has led to a small oil leak as well due to positive crankcase pressure that is caused.
I've had my D4 for about 3 years now (2nd hand). It has always needed 0.5L oil every 1k-1.5k miles, I've learned to live with that to be honest.
The root cause? I wonder if it is related to the oil Volvo recommends. The 0W-20 stuff seems to be very 'thin', and I'm guessing as long as that is used from new, it gets through the oil-ring draining system just fine. At some point, I suspect a previous owner took it to a non-specialist who put a standard 5W-30 (or similar) oil in which would be thicker and clog it up.
I just budget for the extra oil annually and fill as required myself.
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You may have hit the nail on the head there.