With 4.0 now being able to monitor fuel tank levels. I would be really nice for saillogger to be able to use this data along with a trip's length and time to calculate avg fuel consumption. Also, with saillogger being able to track engine hours it could calculate avg gallons per hour. Tangentially, it would also be nice to show avg RPMs for a given trip.
For each trip being able to see Avg RPM, total fuel consumption, avg gallons/liters per hour, and avg gallons/liters per mile/kilometer would be extremely beneficial and can be calculated with data saillogger is already ingesting.