i think 31mpg was my highest mileage on a tank because i do almost all city driving. but 40mpg on the highway is possible after a bit of tuning (keep in mind this car is rated 20c/26hwy EPA) :
video notes:
- engine was at 2600rpm
- a/f was at about 17:1
- ignition timing was incorrect, the log on my laptop indicated 44-48
- cruise speed was set to 66mph
- BHP or horsepower display is too high by about 15-20%
what i did to gain 14mpg improvement crusing:
engine and drivetrain mods are in the signature. but the only economy mod i have is an ECU reflash specifically for fuel economy purposes. This included leaned out A/F mixture from 14.5:1 to 17:1 specifically @2500rpm in closed loop, and general leaning across the powerband. drivebywire throttle map modified for fuel economy. i-avls engagement was modified using a circuit built by a NASIOC member, thanks a lot buddy. Ignition timing was modified by a tuner, i'm not aware of the details for that.
I'm sure pulse and gliding can give me +45 MPG highway figures. just need to find an excuse to get on the highway now, since everywhere i need to go is city travel.