Due to the rising cost of fuel/road tax, I guess people want diesel and here it is.
People don't want diesel, they just have to due to this stupid government and it's global warning rubbish. It's like Hd-DVD and Blueray, and the government taxing Hd-DVD for giving off harmful gases/rays and then everyone has to buy a blueray player because it's cheaper (due to the lack of tax).
People aren't killing petrol nor the engines, the government(s) is subtly killing it off.
If Petrol and Diesel were both the same price with same running costs.. who would want a diesel car over a petrol?