Before she was my wife she bought a '71 Dodge. She ran it for some time and then we headed to Missouri to buy gas (it was cheaper there). The bridge was under repair and we stopped on the Illinois side...and the engine died and couldn't start again for lack of petrol in the tank. There were NO stations closer than the one in Missouri, at the other end of the mile or more long bridge.

I started walking....then walking back. Fortunately some nice soul saw me and gave me a ride back to the car. We returned the gas can to the station and filled up.

She knew to a drop the mileage....