Fuel consumption meter.

Would there be any interest in a fuel consumption meter?

The basic idea would be a small display, on the top of the fusebox, angled so the driver can easily see it.
The sensor is a fuse, modified (while retaining the fuse function and ability to interrupt in the case of faults) and plugged into the injector circuit.

Would also do maximum accellerations, which could give maximum hp figure.

What features would you like?