petrol diesel will clog your catolitic converter over time, this is due to the high sulfur content (50ppm in the US), I've run bio-diesel in my motorcycle at 10% without any issue at all, a very slight increase in mileage with a carburator but with fuel injection should be even better, at that 10% I had no decrease in power or top speed (it was on a 125cc Honda motorcycle) bio-diesel is sulfur free and acts not only as a fuel but as a top end lube, it's also a bio-fuel.
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