Quote:
Originally Posted by XYZ
TIt's correct, and it makes sense. This is not about the fuel being stored in underground tanks where (I agree) the temperature in the ground is relatively stable. It's about what happens after the gasoline is pumped into the hot fuel tank of your car, that becomes even hotter yet, as the temperature of the day becomes hotter.
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So what exactly is it that you think happens? The fuel tank is made of thin metal (or these days probably plastic), with a very low heat content. Put cool fuel from an underground tank in it, and the fuel is only going to warm up by a fraction of a degree.
Now as the day goes on, the fuel will warm up and expand, which is why fuel systems have expansion tanks or header space, but you'll still have the same amount of fuel.