[Lemmy]

I used to run my Mitsubishi L200 pickup on 20/80 ratio of diesel/SVO. In really cold weather I'd substitute a percentage of the diesel for petrol, never had a problem. It was all preheated etc.

On the plus side it was cheap, with virgin veg less than half the price of diesel. It's also low carbon, as the carbon emitted was only what the plant had extracted from the environment while growing (ignoring any inefficiencies caused by fuels used during cultivation of the crop and transporting the fuel).

The downside is that it's horrifically polluting, simply awful for particulates and nitrous oxides, so its really, really nasty for Human respiratory health. I wouldn't do it knowing what I know now.

I'm in England and can't see that you'd pay any taxes for selling the vehicle, unless you're running a vehicle sales business.