Why bother really? just enjoy it imho . Mine just passed 3000k, the first few full tanks I got like 500k+ bcoz I took it easy, now i relax and drive the car like it is so between 400k - 500k is average. Sometimes even less but I know bcoz I push it a bit.
I average around 400-450km/tank in the FD1 now... it actually improved slightly after installing the intake as I didn't need to accel as hard as before, but then over time, I got used to it and started driving the same as before. Combine that with the fact I moved to city and spend considerable amount of time in traffic (thank you Iemma for screwing up Epping Rd), and that's why my mileage has dropped from it's previous average of 450-550km/tank.
From full, drove and used most of the tank, filled all the way to the top, noted down the km travelled and number of litres poured, and then simple maths.
Just checking.....but that is the correct way to do it!
sorry if i hijack this threat but, i was just wondering wat fuel you guys are running to get these km's becuase different fuel contribute to how many km's you get
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