... read her post on where she bought it.

And all Gas is NOT the same.... dont care if it came from the same refinery,
or not.

vol·ume (vlym, -ym):

   1. Amount; quantity: a low volume of business; a considerable volume
of lumber.
   2. A large amount. Often used in the plural: volumes of praise.

A high volume brand at a high volume station means that the it's a brand
of gas that's in heavy demand and at a station that gets heavy business.
 Why is this important?  Because the supply of fuel to that station is
being frequently replenished if it has a higher amount of traffic.  If
however you go a to a no-name, run-down jalopy of a gas station that
hardly gets any traffic, the gas has had time to sit and mingle with
whatever crud is at the bottom of that station's rusty old tanks.

supposedly all

Yes, you can argue that gas is gas, and that gas sold in the US must
meet minimum standards.  However once it leaves the refinery and ends up
in the underground tanks of a gas station, the quality can start to
differ widely.  If you take the time to look, you'll find that quite a
few budget stations get cited repeatedly by state environmental agencies
for failing to maintain and periodically replace the storage reservoirs
underneath the station (and they take the fines because sometimes it's
cheaper than having the tanks replaced).  Some of these neglected tanks
leak into the nearby soil (and ultimately, into the water table),
sometimes soil gets INTO the gas you're about to put into your tank, and
still others contaminate the fuel with sediment or rust.

While you can't just go and dig a hole to see how a service station's
tanks are doing, you can deduce fairly well that a station getting lots
of volume is making enough money to do required maintenance.  Even if
this isn't the case, at the very least the fuel doesn't get as much time
sitting in storage to get too heavily contaminated.  And generally a
high traffic station has repeat business, meaning quite a few people
have fueled up there and not had any problems.

Cheaper isn't always better.  And I have found that there are some brand
name gas stations that get plenty of business (there's an ExxonMobil
near my house in Central NJ) that ends up matching the Raceway discount
station just south of it in price fairly often anyway... though for the
time being I still gas up at the Raceway once in a while because I know
for a fact they just built that station and the facility is shiny and
new. :)