I dont understand people that worry about sucking up crap when the car gets low dont they realise that the fuel is taken from the bottom of the tank at all times.I have a ford focus st diesel 2.0 i can drive with my fuel tank coming up with 0.0 and i know i can go around another 20 miles how do i know! every time i get a new car second hand or new i fill up a can of appropriate fuel and go for a drive when it says 20 miles remaining when i run out i put fuel in and i know where i stand if i am to be caught out more or less it stems to when i bought a nice new A plate xr3i in 1984 my first new car as i was blowing all my mates away in my car the fuel consumption was crap i remember we was all going out on a friday drive and my car said a quater of a tank and i ran out of fuel felt really bad turned out to be a sender unit issue changed under warrenty the mechanic suggested to do it as its what he did to check the unit.