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Defined motorsports

always wondered if filling up in the colder hours of the day yields more gas when the temp rises and the gas expands. 

Defined motorsports said:

always wondered if filling up in the colder hours of the day yields more gas when the temp rises and the gas expands. 

I’ve seen that recommendation somewhere. 

With bulk storage tanks underground, the fuel temperature won’t change much, if at all.  You can argue the point that a “hot” tanker truck load will *lower* the density of the fuel in the tank, but that’ll cool off in a day or so.  

No, the only appreciable issue with cold fuels, is excessively topping off a vehicle that would be driven down the block and parked on a hot street.  You *could* encounter a situation where liquid fuel is forced into evaporative emissions equipment, as the fuel in the tank warms up and expands.  Not very likely, but possible.

 

In reply to Defined motorsports :

No because the tanks are underground and mostly unaffected by daily air temp changed.

The single best way to save gas… and I know we all hate to hear it… is to slow down.

The last time gas prices went bonkers back in 2008 or so, I was driving a 97 Ram 1500. By changing my driving habits (using some hypermiling techniques) I went from a 12mpg average to 18. A 50% increase. 

I’m daily driving an ND Miata now, and was getting 30mpg on average. By limiting my highway speed to 70mph and using higher gears in the city, I’m now running 37, a 23% increase in fuel economy. 

No amount of tire pressure tweaks or time-of-day fueling hacks is going to reap that kind of benefit. I can’t wait until prices come…

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