Thanks for that. It is a debate I have often had. Will the extra trips to the petrol station compensate for the weight saving? (bear in mind I can never just buy fuel, I have to get a magazine, an exrental DVD, the current pump offer (glowsticks, flasks and blankets etc), a packet of crisps and a chocky bar. I guess I fill up about 3 times a month at the moment. I'll try filling up more often and using less fuel and see if the fuel consumption goes down.
