[MetroMPG]

SW replies...

Maybe you could modify the meter with a heated needle and then run some thermal paper past it while driving... j/k

But seriously, if you had a way to make periodic voltage readings with your laptop, you could effectively record the current at intervals by reading the voltage across the shunt (that's what the meter does). Depending on what other measurements you recorded at the same times, you could build some interesting data to play with (like vehicle speed, braking, battery voltage, SOC, etc).

There must be a cornicopia of A-to-D devices you can plug into an RS232 port with which you can take voltage recordings.