Shameless plug alert! If you're going to get a ScanGauge, we sell 'em:
ScanGauge MPG gauge: improve your fuel economy - EcoModder.com.
Helps support the forum.
You could also use an
MPGuino .
Fine tuning the driver is going to net you the biggest gains quickest, and instrumentation will help. Sounds like you're already making a decent effort. Avoiding the brakes is one of the big ones.
So is keeping an up to daet fuel log so you can track your performance.
If you have a regular commute and instrumentation, every day can be a competition against your previous best. Nerd out. Log all the data.
