No Myth - continued
There is also a difference in the fuel additives for the different seasons, to help with freezing and such.
Another big problem with the empty tank is for the long term life of your car.
There is the condensation previously mentioned that makes your car run like crap, but it also causes the inside of the tank to rust. The flakes get knocked off when you fill up and settle to the bottom of the tank.
The further down in the tank you get, the more of the particles you are sucking into your engine. When is the last time you changed your fuel filter?
I consider 1/4 as empty. I can't do 1/2 because I would have to get gas every day instead of every other day like I do now. (700 miles a week minimum).
