I know what you mean, that's why I thought I had miscalculated at first.
I put fuel in when the needle was on the 1/4 mark, I put £41 in which took the gauge upto just under the full mark, reset the trip to 0 and when the needle reached the 1/4 again I had done 412 miles.
I also calculated it at the approximate mid point and that gave 37 mpg. I must admit I does sound very high. I'll shall keep doing it and see what I get.
Humm, not the most accurate way of doing the test i dont think.
what you should do is
- fill the tank to the brim
- reset your trip counter
- drive around
- go back to the pump
- fill the tank up to the brim again....
....and however many ltrs went in, work it out with the number of miles on your counter, never having to worry about the needle position, which i beleive we have all found to be inaccurate.
give that a go next week, and report back.
either way, your doing a great job with your mpg, easily one of the most econimical IS's. [source: http://www.spritmonitor.de/en/overview/26-...km=0&sort=1 ]