This is in my 94 mazda mx6. 2.5fi manual 5 speed with overdrive and regular distributor.
As far as I can tell, if I run an entire tank of gas out and check the milage I will get about 1.5mpg less than if I fill up every time I get to a half a tank. Usually mpg is about 23 if I measure it from a full tank. I get 24-25 if I keep the tank from dropping below a half a tank. This makes no sense, because you would think that the extra weight of the gas would make the milage worse.....been testing this for several months now.....
As far as I can tell, if I run an entire tank of gas out and check the milage I will get about 1.5mpg less than if I fill up every time I get to a half a tank. Usually mpg is about 23 if I measure it from a full tank. I get 24-25 if I keep the tank from dropping below a half a tank. This makes no sense, because you would think that the extra weight of the gas would make the milage worse.....been testing this for several months now.....