Quote:
Originally Posted by OM617YOTA
With these cars and I think IDI diesels in general, it isn't the oil wearing out that requires the change, it's soot loading reaching max thresholds. So whether dino or synthetic, without significant extra filtration to remove the soot, OCI will remain the same.
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One would think that more use equals more soot loading. If that is the case driving only on the weekends would equal less soot loading per time period.
An Oil Analysis would show the soot level and tell you if that is a problem.
It is a fact that private parties and money making trucks are saving money by extending Oil Changes while using synthetic Oil. You initially need to use Oil Analysis to determine how much use you can get from your Oil.
Of course in industry the Oil Analysis is also used to find evidence of pending mechanical or coolant leak issues.
I agree with the extra filtration and that I why I have a bypss Oil filter on my Mercedes.
In short an Oil Analayais could tell him how much use he can get out of the Oil and then having some actual facts the owner could make a decision.