I don't know what you are paying for gasoline....
but here where i live, i am paying also higher price,
up to $3.50 per gallon.

Only buy or fill up your car or truck in the early
morning when the ground temperature is still cold.
Remember that all service stations have their
storage tanks buried below ground. The colder the
ground the more dense the gasoline, when it gets
warmer gasoline expands, so buying in the
afternoon or in the evening....your gallon is not
exactly a gallon. In the petroleum business, the
specific gravity and the temperature of the
gasoline, diesel and jet fuel, ethanol and other
petroleum products plays an important role.
A 1-degree rise in temperature is a big deal for
this business. But the service stations do not have
temperature compensation at the pumps.

When you're filling up do not squeeze the trigger of
the nozzle to a fast mode. If you look you will
see that the trigger has three (3)stages: low,
middle, and high. In slow mode you should be pumping
on low speed, thereby minimizing the vapors that are
created while you are pumping. All hoses at the pump
have a vapor return. If you are pumping on the fast
rate, some other liquid that goes to your tank
becomes vapor. Those vapors are being sucked up and
back into the underground storage tank so you're
getting less worth for your money.

One of the most important tips is to fill up when
your gas t ank is HALF FULL or HALF EMPTY. The
reason for this is, the more gas you have in your
tank the less air occupying its empty space.
Gasoline evaporates faster than you can imagine.
Gasoline storage tanks have an internal floating
roof. This roof serves as zero clearance between the
gas and the atmosphere, so it minimizes the
evaporation. Unlike service stations, every truck
that loaded with gass is temperature compensated
so that every gallon is actually
the exact amount.

Another reminder, if there is a gasoline truck
pumping into the storage tanks when you stop to buy
gas, DO NOT fill up--most likely the gasoline is
being stirred up as the gas is being delivered, and
you might pick up some of the dirt that normally
settles on the bottom. Hope this will help you get
the most value for your money.