We're going lakeside camping on Whidbey Island and debating whether to take the ferry or going the long way by car. Only about 90 min from home so I don't know if that qualifies as a staycation or not.
I did some more checking and there seems to be an equal number of sources supporting it and not. My take is that the assertion arose possibly from people remembering their old physics classes about what happens when gas (or any liquid) heats and cools -its density either expands or contracts. It doesn't account for storage tank placement or how its measured by volume coming out of the nozzle.
Lucky I take the bus so I spend less than $600 a year on gas.
Just read this in a science mag:
When you buy gasoline, you might want to make your purchase at night - it will be cheaper. Gasoline becomes more dense in cooler temperatures, and gas pumps measure gas by volume.
I have a set and though not exactly screen accurate (there's better ones out there), they look fine hanging from the left side of my belt till you upgrade to something else. Mine were said to be Swiss however but look exactly like what you've got.