Best I've been able to get over EPA (combined) with driving technique and no mods (that made any noticeable difference) is about 55-60%. Honestly, none of my subtle mods have made
any noticeable difference in FE. YMMV.
As Daox said, Instrumentation (ScanGauge or UltraGauge) will help you fine-tune your technique more than anything else.
I bought a ScanGauge II about a year before I found ecomodder.com, so I was getting about 50% over EPA(combined) (on Summer fuel) when I got here.
And I noticed today that I get about 10 MPG idling in 1st gear toward a red light versus 0 MPG
stopped at the same red light at idle. Works for me!
