Quote:
Originally Posted by WD8CDH
I don't suspect any permanent damage but since it's getting really cold at night this week, I did throw in a couple of gallons of kerosene to thin things out before filling the tank with diesel. I suspect that the injector tips and combustion chamber got a little cruddy so I will throw in some biodiesel and/or diesel purge and do an Italian Tuneup. 
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YES there CAN be permanent damage. If you read the REAL OLD tech service bulletins, when they started using blended oils with additives in the cars and there was a distinction made between API-S for spark engines and API-C for compression ignition engines, Mercedes included a flyer in EVERY diesel car owner's guide telling them not to use the "new" multi-viscosity blended oil, even if pure, because it had vanadium in it.
I have no idea on the face of this earth how this could impact your car and I don't know if it's still in the synthetic blends, but MB was VERY insistent on the issue to the point where they said it would void engine warranties!
You could still, at that time, add a quart of 30HD (aka SAE 30w pure) in a mix and it would be ok, but NO BLENDED OIL.
I have never been able to get anyone from an oil company to tell me about that so I don't know the effects but since MB insisted and they weren't making any money off any particular oil products they had no reason to favor one oil over the other.
That's all I know and I'm sticking to it.
I didn't realize you could still get the fuel that way if you needed it. Thought it had to be a new car. Cool.