I similarly get about 17mpg on the run to and from work (which is why i dont use the omega anymore for that tbh!). On motorways it jumps up to about 40mpg, however.
But i had a query about this. It feels as if i have to rev the engine harder than i would expect to get her moving, which i think may be contributing to a higher mpg. It would be nice to get it to something more like 20-25mpg on local roads.
For instance, i went from Cannock to Manchester and back the other day, by the time i got off the motorway the readout read 31.7mpg but then in the 3 or 4 miles from there to home that had dropped to 30.1mpg. Significant effect then, really, given that it was a 150 mile round trip (in manchester i drove to the airport parking area and back again, so not long spent faffing around!).
Is there anything simple i can do (other than the right foot option, as im trying my hardest not to overuse the loud pedal when im driving around at low speed) that could improve the local road fuel consumption. It feels as if its a little low on power low end....
(one thing of note, when changing the cam covers a while back i noticed the connector in the plug leads had snapped off on cylinder 2. Its not misfiring, but if i tried to pull it out whilst running id get a nice little shock, which suggests it might not be the most efficient spark in the world. Could this be having an effect on mpg?)