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machina |
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#1
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Advanced Member ![]() ![]() ![]() ![]() Group: Benefactors Posts: 2,030 Joined: 21-June 03 From: Miami Beach, FL Member No.: 848 ![]() ![]() |
My last race was in november.
Have about 4 gal left in my 10 gal fuel cel. Should I add fuel stabilizer? Probably won't run again until April. Also, will the stabilizer damage the fuel cel foam or bladder? thanks, dr |
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Sammy |
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#2
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. ![]() ![]() ![]() Group: Members Posts: 1,190 Joined: 21-January 03 From: Orange, Ca Member No.: 178 ![]() |
Gasloine is blended from low octane straight run gas and high octane reformed or cracked gasoline (modified molecular structure).
The reformed refining process not only modifies the molecules, it optomizes ring type molecules, i think they call them aromatics. They are inherently unstable over time and break down into less desirable chain type molecules. Gasoline has vapor pressure (a measurement of the tendency to evaporate). Gas sold in the summer has a lower vapor point than gas sold in the winter because the hotter temperatures of summer would promote more evaporation. Over time the light ends of the gas (hydrogen, iso butane, etc.) will evaporate and leave the gas with lower octane ratings and higher concentrations of parafins and varnishes. That, and the break down of the aromatics is what makes the gasoline smell bad. The breakdown of gasoline is dependant on a few things. Whether the gas is high RVP or low, the temperature and hunidity of where it is being stored, and how well it is sealed from the atmosphere, and the level of the tank. Normally you can count on a loss of around 2 octane points in the first month, then 1 per month after that if it is high RVP stored in a warm or hot environment. To make gas last longer, use sta-bil. AFAIK it has no negative effects. Otherwise, try to keep the gas stored in a cool dry place, keep the tank as full as possible (reduces the rate of evaporation), and keep it sealed as well as possible and reasonable. It has to breathe, but don't leave the cap off if you know what I mean. |
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