I have no idea, I haven't been driving like I used too so I haven't bought a full tank since February. I just buy about half a tank and that lasts over a month with the amount I drive at the moment. I have an app that calculates the mileage I get but I would have to fill the tank and I just haven't had a need for a full tank.
I look at half a tank as empty, you know fuel cools your pump.
Owner's manual for my car says to not run it below a gallon as then the pump is exposed. What I'm doing is fine.
Its heat, spoken like someone who has never replaced a fuel pump.
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