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Re: Why doesn't gas evaporate anymore?
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Posted by Buzzman72 on October 24, 2003 at 07:39:08 from (67.241.15.6):
In Reply to: Why doesn't gas evaporate anymore? posted by Dieselrider on October 23, 2003 at 17:22:47:
Part of the reason has to do with environmental concerns and emissions control. On old equipment, such as antique tractors, there was no vapor management system, charcoal canisters, purge valves, and the like; consequently, gasoline vapors would be vented into the atmosphere, where they would dissipate as they were diluted by good old air. Nowadays, the EPA says that's not good enough...and since they can't recall 60-year-old tractors and lawn mowers to put evaporative emission equipment on 'em, they've coerced (as in "BIG fines") gasoline refiners to make gasoline less easily vaporized. I think the term I'm looking for is "Reid vapor pressure," but I'm a little rusty on that part of my high school science education.
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