Are pez engined models and less of a liability? I'm starting to think that old modern diesels with all the associated accessories that can go wrong can be a bit of a risk
Depends on how much you spend on the car in the first place and what your mileage is. By my (possibly incorrect) workings out, using current fuel prices of 118.9 for petrol and 120.6 for diseasal, if you only paid £1,000 for the car, if you got an MPG of 36.86 in the diseasal compared to 28.29 for the petrol version (from fuelly), by the time you had covered 23,626 miles you would have recouped the full £1k.
Okay, I wouldn't spend big bucks on a diseasal as you could well lose most of your investment if it shits itself but for cheap practical motoring it seems a fair gamble if you cover enough miles.