I ran out one time... Tried to push 40 miles after gas light... It took 5.8 gallons when I filled her up.

Will not happen again... 185 on that tank and yeah I was running over 80 mph for most of that tank.

 

ok.... get a fuel mileage app for your phone. I have Simply Auto (formerly Fuel Buddy) I track each and every fill up. I know I have a 6 gallon tank. I know I can get 200 miles on a tank on my daily rides. I reset the odometer at each fill up, enter the fuel info (I write the mileage from the regular odometer on the fuel receipt and enter when I get home or stop or whatever) and track. I know on a trip, where my speed is more steady and I'm using cruise, I can get up to around 230-250 on a tank. I do not trust the fuel gage. and when the light comes on, I confirm mileage on the odometer. Too many variables with the fuel gage and computer. After tracking for couple years, I have a dang good idea about my fuel usage!!! Yeah it takes time. It takes a bit of commitment. And it might be a bit ****, but I haven't run out of gas yet!!! Over 31k miles on the clock!

 

I've put 5.4 gallons in mine before. Granted the miles-till-empty said "Lo".

 

I do the same thing. I use aCar (I think). I also use that to track all my maintenance and back it up to the cloud and my computer, and keep hard copies of the spreadsheet. If I take a trip, I can track all my expenses. It really comes in handy.