Horrible gas mileage
4 Answers
Check engine light on?
1 people found this helpful.
Simple, stop sleeping. Maybe your neighbor has a siphon hose and a car that's getting inexplicably great gas mileage :) In all seriousness, how are determining it's losing gas overnight, are you going by the fuel gauge? You might be seeing a faulty reading when parking versus when you start car up in morning.