Quote:
Originally Posted by cRiPpLe_rOoStEr
Even though it might look outdated, the indirect injection used in the 6.5 is not that bad at all, as it tollerates low-quality Diesel fuel and even vegetable oils better than the direct injection used in the Cummins.
Propane would be my second-to-last fuel choice.
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Yes, they can and do run into coking problems from poor set ups that run Waste Vegetable Oil (WVO), but that is the result of the poor conversion design and operation. The 94-98 12 valve Cummins are especially capable of running these free fuels with good reliability if the fuel system is designed well.