Yeah so on my drive home from Edmonton to Wainwright I somehow got 155kms to 14L of fuel. I worked it out to right around 30mpg. Gotta love the CA!
every car I own I throw in one of those cheap autometer air/fuel gauges. Aslong as the gauge is flipping out back and fourth your o2 sensor is in closed loop and it leans out your engine quite a bit hence much better gas millage. Just keep the car out of boost pretty much and it wont be bad. I was getting the same millage driving a RB25 4 door Skyline to Vegas and back. It was great.
Even when I tune my eprom for my RB30, once im in closed loop I run it much more lean and a nice even map. I will let you guys know what millage I get with the 3L.