Re: Recommended Gas

Posted by Mike Flanagan on June 12, 1997 at 15:01:47

In Reply to: Re: Recommended Gas
posted by Bob Johnson on June 12, 1997 at 09:42:21

: Mike,
: The new gasoline was formulated to reduce emissions.Part of the emissions reductions come from evaprotive losses.Gas is made up of around 500 compounds which all boil at different temperatures. The new gas is suppose to have less compounds that boil a lower temperatures ("heavier").Also note that gas is formulated differently for summer and winter. The summer mix has a higher overall boiling point.
: Bob
Bob, I am as far from a pertoleum engineer as the spectrum will allow however I am somewhat of an egghead when it comes to trying things to solve problems. When I first noticed the problem in summer of 95 and discovered the gas was "hissing" in the carb when the engine was shut off I started experimenting. After much mechanical work on the carb I began to suspect the fuel. In 96 when the reformulated showed up I happened to be where it was being used and the problem began to get increasingly worse at 100 degrees at 4000 feet I had real trouble. This led to the coleman stove experimentation. In this case the gas/diesel mix boiled at a significantly higher temp. And the two gallons of gas in an open bucket evaporated in 12 hours at ambient 100 degrees. I do not mix every tank, just when the temp/elevation/engine mood requires but whenever he tells me he needs a little "shot of the good stuff" I give it to him and he seems to like it fine. I used to enjoy a little taste myself on occasion.
God speed under 50.
Mike Flanagan, The Model A Fool.

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