Quote:
Originally Posted by ChillRider
Well, today I bit the bullet and performed my Zong's 700 km regular oil + filter change using a "mixed fleet" turbo diesel 15W40 oil (some generic German "Federal" brand, sorry, no fancy Shell Rotella or Chevron Delvac here), in place of the previous 10W40 semi-synth I used for winterizing it,
Can't go wrong with API CF/CF-4/SJ as well as MB (Mercedes Benz, not JASO ;-) MTU, MACK, VOLVO, CUMMINS etc. OEM approvals, eh?
Well, TBQH there wasn't any difference during starting up (with a semi-warm engine at least) or even a spirited test ride between anything I've used so far. The feeling is in fact very similar (for now) to the 10W40 oil that was in there before, other than the usual "new oil" perks like smoother gear changes, more progressive clutch action etc. Again, for now.
TBQH I expected at least gear changes to be noisier/grindier right off the bat, due to less engineered-in shear resistance, but I guess that's something that only a longer term test will show. If anything, I expect it to lose its properties way before even the 500-600 km a typical moto 4T mineral oil manages.
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You might be waiting a while. Most "diesel" oil has a high shear and compression resistance engineered into it, especially under higher thermal loads. It's those properties along with their high detergency to suspend material particles (this sounding familiar to moto oil?) that are the basic hallmark of any good "diesel" oil.