filled up with petrol last night reset the odo meter, when i got home it was 29 something, woke up this morning at it read 21 mpg, reovered to 24 mpg were its been sat on the way back home fluctuating up and down between 23 -25, normal average is 28mpg, any idea's?

[quote name='Robin Banks' post='710592' date='Feb 23 2010, 07:13 PM']filled up with petrol last night reset the odo meter, when i got home it was 29 something, woke up this morning at it read 21 mpg, reovered to 24 mpg were its been sat on the way back home fluctuating up and down between 23 -25, normal average is 28mpg, any idea's?[/quote]

You can't really go by the built in trip, particularly on a single tank, it's much more accurate to fill it to the brim and record the mileage, then next time to do the same and work out how much fuel you've put in to brim it against the mileage, then you'll get an accurate MPG.

yeah i suppose you are right, it idles higher than before around the 1100 rpm when before i'm sure it was 800, also seems a lot more eager to kick down.

^^ usually does this when cold, try using snowmode and vpower shell (y)