Well, when I go for a drive it's country lanes but very steep hills and maybe the occasional 'detour' on a few tracks. Then there's the pooling around town or the 900m drive to the local coop and back. Because its cold. And I'm lazy. And I won't take the diesel Audi on such short journeys.Do you re-set your fuel/trip computer each time you fill up to clear the residual memory of the fuel computor?? also is that 15 mpg poodling around town or on a motorway at crusing speed say 65 ish??? Have you tried a K&N panel air filter in your air box as these do help a little or do you just drive it like you stole it hence only 15 mpg. LOL
She'll happily sit at 22+ on a longer run on the bypass or motorway.