Re: When is gas considered old

Posted by hntndaylight on May 02, 2003 at 13:46:02 from (152.163.188.71):

In Reply to: When is gas considered old posted by Eric on May 02, 2003 at 12:21:03:

Old gas has a unique smell. An sick sweet odor that lingers for what seems like forever. When crude oil is refined the gasoline is not made it is "sorted" out. This sorting leaves a product that is composed of various volatile organic compounds. This mixture includes some heavier compounds, also as the lighter and more volatile a petroleum product the more rapidly it ignites but the lower the BTU's in a given quantity. Petroleum is also the base stock in plastic manufactoring. Most plastics are little more than a particular "sorting" of crude oil. As the more volatile compouds evaporate/separtate what is left if a mixture not unlike plastic resin/styerfoam/or napalm. Too thick to flow properly. I use a product called "Stabil" which slows this process in every can of gas. While a can of 6 month old gas, which smells ok would probably be fine, before I started using a stabilizer I always poured it out and bought fresh. Just not worth the hassel if I do have to drain it for 5 or 6 dollars worth of fuel. The other question you have to ask is how long was the gas refined before you bought it. All gas is "old", haven't been any dinosaurs for a long time. Seems like Ben in KY said, our gas here doesn't last long. Probably means that it has been sitting a while at the refinery or uses a different base stock than in some other areas. I would expect gasoline comming from W.T.Intermediate tostay fresh longer than that made from heavier crude such as is produced locally (high asphault)

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