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Dan F · Nov 18th, 2002, 11:01

£30 of fuel will only put 3/5 of a tank in my car. :-(
You need to (as suggested above I think) zero your trip meter, fill your car up, drive it around until it is 1/4 full and then fill up again. (Same amount of clicks on the pump nozzle as the last time, ;-) )
Then write down the mileage on the trip meter. Write down the amount of litres you have used and convert to gallons and then divide miles by gallons. Simple.
e.g:
You have used 48.67 litres and driven 350 miles. Divide the litres by 4.546 and that will give you 10.91 Gallons.
Divide 350 by 10.91 and you get 32.08 mpg.
This is a pretty accurate way of doing it as long as you use the same criteria to fill up everytime. If you do not have a trip computer then it is a good idea to do this every so often, as sudden increased fuel consumption can indicate various problems with the car. The more you check the earlier you will catch it.

I get 33 out of my T4 on a run with varying, moderate speeds and anything from 22-26 around town depending on how much fun I have. ;-)
That is using Optimax as well.

Cheers,
Dan.

Nov 18th, 2002, 11:01	#6
Dan F Premier Member Last Online: Apr 7th, 2008 13:05 Join Date: Dec 2001 Location: Worcs	RE: FUEL CONSUMPTION QUESTION £30 of fuel will only put 3/5 of a tank in my car. :-( You need to (as suggested above I think) zero your trip meter, fill your car up, drive it around until it is 1/4 full and then fill up again. (Same amount of clicks on the pump nozzle as the last time, ;-) ) Then write down the mileage on the trip meter. Write down the amount of litres you have used and convert to gallons and then divide miles by gallons. Simple. e.g: You have used 48.67 litres and driven 350 miles. Divide the litres by 4.546 and that will give you 10.91 Gallons. Divide 350 by 10.91 and you get 32.08 mpg. This is a pretty accurate way of doing it as long as you use the same criteria to fill up everytime. If you do not have a trip computer then it is a good idea to do this every so often, as sudden increased fuel consumption can indicate various problems with the car. The more you check the earlier you will catch it. I get 33 out of my T4 on a run with varying, moderate speeds and anything from 22-26 around town depending on how much fun I have. ;-) That is using Optimax as well. Cheers, Dan.