I though this didn't sound right so I checked it. Â£10 at Â£1.20 litre buys 8.33 Litres of fuel. This equals 1.83 Gallons. To do 100 miles on this much fuel the vehicle would need to be doing nearly 55 miles per gallon. To do 110 miles it would need to be doing 60 mpg. Now I may be slightly out of touch but since when did the "average" car manage that sort of fuel performance? I've driven some that managed over 50 on a long steady run but they were very much the exception. With "expert advice" like this no wonder people are running out!