Wednesday, September 09, 2015

For whoever was arguing with me about how long gas is good for... Hot Rod Magazine weighs in

From the refinery into your engine, street gas only “lives” about 30 days.
(that's how long it's around before your car uses it up)

But thanks to purer components and specific additives to extend shelf life, quality race fuels like Rockett Brand can stay potent for several race seasons.

But fuels have to be stored the right way—if you’ve ever unscrewed the cap on a fuel can that sat in the sun, you’ve heard the hiss of gas escaping.

This “weathering” is the loss of the fuel’s light ends through evaporation—the lighter hydrocarbons are escaping.

So to prevent your fuel from weathering, do the following:

• Keep fuel in a metal container: light deteriorates fuel, so this is the best way
• If you must keep it in a plastic container, make sure it’s dark colored
• Ensure that the container’s O-ring seals properly, and isn’t damaged or brittle
• Keep the jug’s caps and vent caps tight: they’re there to prevent massive vapor buildup, but keeping them closed tight won’t allow evaporation to break down your fuel
• Store your fuel containers in a cool place, away from sunlight

This backs up what I said, gas stays fine for about 4 - 6 months without any noticeable loss of performance if your car is garaged, or not going through extremes of climate change.

http://www.hotrod.com/how-to/engine/1509-everything-you-need-to-know-about-octane/

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