I live approx 3.8 miles away from work which i commute to on a daily basis. I do the odd trips to mums, friends etc all within the same area/radius. From time to time i also travel 225 miles to coventry on a weekend. I filled up my Seat Leon FR TDI on Saturday with £10. I have done so far 38 Miles and it tells me i have 20 miles left, although i suspect ill get about 10 if that. So on that basis i think many would agree, that is a poor return. I have been toying with the idea of getting rid of it and buying a petrol car as ive covered 17k in 4 years which is probably no where near worthy of a diesel car. Question is, if i got a petrol equivalent or similar 170bhp etc. Would the fuel economy be the same or worse?