hello people i have a gp 1.2 and was wondering how many miles people are getting to a tank. i am using mine for driving to and through from work and the ocassional run to tescos averaging 37 miles to the gallon but only getting about 300miles to a tank!!! used to get about 350 but now dropped. i serviced the car about 4 months ago changed all filters and plugs.. any ideas????:bang: