It’s obviously frustrating and of course will affect the resale value when you come to move it on. There’s not much you can do about it; perhaps you could consult the consumer affairs people to get their opinion on whether Nissan should provide some compensation for what would seem to be an issue with their cars. One way of reducing the wear on seats is to slide the seat back before getting out, that way you won’t rub the seat as you exit. It’s the same when you get in, if the seat has already been slid back you won’t rub across the bolster as you enter, and of course you then have to slide the seat forward to your normal driving position.

I would say that you're getting excep tional fuel consumption from your Fairlane under all the conditions you quote. Less than 10 litres/100km for such a big car with a V8 is good. I can't give you a real-life fuel consumption figure for your car, but I would say that its performing well on the basis of the figures you've supplied.