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I read with interest Bill's information on gas. I think a few points need
clarification.
I live in Northern Illinois, where the famed Minneapolis "Norther" comes
sliding down here about 12 hours after it hits Minneapolis--bringing out the
worst results of bad gas in autos.
I owned a gas station once. Both of my sons are Electrical Engineers who
have worked at refineries and on the pipeline from Texas to Illinois.
>From my gas station experience, I think that most water in the tanks comes in
from sources other than holes in the tank. Seepage from bungs at street
level, condensation and rain entering vents, and--most likely, water
dissolved in the gas from the pipeline and storage terminal tanks, which
condenses into pools of water in the bottom of the service station
tank--leaving a pool of an inch or more--which then redissolves back into the
gas as the temperature changes and as the interface is agitated. The storage
tanks at the pipeline terminal have enormous amounts of water in them.
Most people think that when they buy "Brand X" of gasoline, they are getting
gas from that refinery. Not so around here. We are not close to any
refinery, and everything gets shipped trough one pipe. I have seen the same
gas delivered from the terminal to dozens of different brand gas
stations--and, contrary to belief, no "special additive" is added to make
that gas any different from the station in the next block.
Years ago, when the Gas Chromatograph was first invented, I analysed several
samples of auto gas. It was an amazing conglomeration of different petroleum
fractions; none of which had any rhyme or reason. There was no distinct and
reproduceable fraction of C6, C7, C8, etc from lot to lot. I would classify
it as "Light still fractions, with a lot of heavy still heels thrown in for
good measure.
My expertise at that time was fractonation of organics by distillation.
Based on what I have observed over the years, I would be hard pressed to get
into a plane fueled with service station gas, other than, perhaps a Cessna
150....
David Jones
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