What about using the average for all runs involved and just making one large gaslog entry? You could then post all the individual "tanks" in the report thread. But, individual entries don't really bother me either. Depends if the short-run inaccuracies hurt your average or give you a massive boost...
EDIT: I just checked my gaslog and realized I have a couple of tanks at 4 gallons that worked out to 150-200 miles. Geez, never mind me, I must have been thinking in liters before...*smacks head*
__________________