Mixing petrol with veg oil is not false economy. To thin veg oil you can heat or mix with petrol. Yes, combustion is slightly wise with petrol but using a cetane enhancer like veggiboost restores the power to that of standard diesel.
Also, it is cheaper to use petrol because thinking with diesel would take say 50% diesel or 15% petrol - which is cheapest? Petrol is only harmful to a diesel pump because it is too thin to lubricate it. Mixed with veg oil it becomes the same thickness as diesel.
I kno theory says don't do it, but please have a read on the forum - practice shows it works very well, even in winter!
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