NO DON'T DO IT TO YOURSELF!!!!!!!!!Inlaws got a single cab 2x4 its a pig on juice especially towin a boat, bout 350k's max if ya take it steady feed it and it get's worse.Stick with a diesel can't go wrong reliabilty and re sale there's a good reason why the petrol's are cheaper.I'd have to guess that the 4x4 twincab would'nt be better on fuel.