I wouldn't, I'd go for petrol this time round. Over the last six months diesels have dropped in value by an additional five per cent over their normal expected fall in value and I think this will get worse. It can make bargains out of new diesels in dealer stocks that they can't get rid of, but - because diesels cost more to make, but the market values them at less than petrols - manufacturers will now simply stop feeding the market with as many diesels.