Last Thursday I got my license, got gas and reset my trip meter. I got gas again today and forgot to reset it. Should I keep it running to mark how many miles Ive gone since I got that sacred piece of paper instead of reseting it every time I get gas to calculate gas mileage? I can still calculate gas mileage, I just have to write down where the trip meter is at every time I fill up.

^ My Actual Gauge. Photo taken a few minutes ago.