415 miles today!

[Kaotic Lazagna]

Originally Posted by screenprintr

That's weird. You get better mileage filling up more?

Since I wasn't sure if you meant filling up more often, or filling up more per fill up, and since I answered in terms of the former, I will answer for the latter now.

Filling up more per tank will not get you better mpg as it'll be adding more mass/weight to your car. I fill up to full because I don't want to have to keep filling up often, so I take that mpg hit. I don't let my tank go lower than 1/4 tank (which isn't really 1/4 tank because the gas tank isn't a perfect square) because in my experience, it did something that caused my mpg to decrease a lot. I'm assuming it's sucking up sediments/debris that settled at the bottom of the tank or something.