"nestork" wrote in message
...

Gordon Shumway;3321919 Wrote:

I don't know if this is 100% correct, but it must be because I found
it on the internet. :-)

All I do know is gasoline with alcohol in goes bad much quicker than
gasoline without alcohol. Storing this gasoline even with your own
additives won't stay good very long. You can thank our wonderful EPA
for this.

Further to Gordon's post, people should take oil company's claims about
their gasoline being "best" with a grain of salt.

You see, a refinery is very expensive to build, and the cost of
pipelining or trucking oil to a refinery is tiny compared to the cost of
building refineries.

So, typically, refineries will be built in major cities where there are
surrounding oil fields, and the oil from everyone's oil fields will end
up in the same refinery... getting there either by buried pipeline or by
truck.

Oil companies will "unitize" oil fields that extend under land where the
royalty rights are owned by different people or companies so as to
maximize the production of oil from that field. That is, if each
company knows that every barrel of oil they don't produce from their
land will be produced from their neighbor's well on their neighbor's
land, they'll all produce as much oil from every well they have as
quickly as they can to prevent losing oil to their neighbors. That
results in less oil recovery from the reservoir than would happen if
they "unitized" the oil reservoir and produced oil from it in a more
sensible way (such as by injecting water at some wells to maintain the
reservoir pressure, and thereby maintain high oil production from other
wells, for example). Similarily, they can re-inject the solution gas
that comes out of the oil to maintain the reservoir pressure and produce
more oil out of that reservoir than would be realized if they each went
nutz producing as much as they could from their own wells.

So, while you may have an Exxon refinery in one city, there'll be oil
from many different oil companies all going to that same refinery, and
each oil company gets a share of the production from that refinery,
depending on how much oil they deliver to the refinery on a monthly
basis.

So, when you hear oil companies advertising that their gasoline is best,
you have to ask yourself how the refinery knows who's oil is coming out
of the pipe at any given time. Since everyone's oil is mixed together
in the feedstock going in to the refinery, there's no way of changing
the formulation of one company's oil or gasoline without changing it for
everyone. All of the oil goes in at one end, and the gasoline,
aviation fuel, heating oil and asphalt comes out the other end, and it's
divided up according to how much oil each company delivered to the
refinery, and everyone's gasoline is the same, just as everyone's
aviation fuel and home heating oil is the same. The refinery will make
sure that it's operation is set up to maximize gasoline production
(usually) or perhaps aviation fuel or home heating oil depending on
what's most needed and fetches the highest price at the time. But, they
can't change the formulation of one company's gasoline without changing
it for every oil company that's delivering oil to that refinery.

So, if you live in a city with a refinery, or near a city with a
refinery, then almost certainly the gasoline you buy will come from that
refinery and it'll be the same stuff regardless of who's selling it;
whether it's at a Shell, Texaco, Amoco or Chevron gas station.

I don't know if oil companies formulate their engine oils differently,
but I expect there would be differences in synthetic engine oils since
those don't come out of a refinery (so far as I know).




--
nestork

Gasoline additives vary between companies.

Ken