How long can gasoline be kept in a sealed but not airtight plastic gas can?

Answer 1

Use any gas before its birthday. I keep Lawn mower gas in air tight plastic containers and only buy enough for each season in two 2.5 gallon containers and one 1 gallon container for two stroke oil gasoline because when you add oil the gasoline gos bad faster.

Answer 2

I stored a barrell of gas in late '99 for the Y2K scare and just used it all... seven years later. Seemed to be fine. The oldest gas I tried was 9 years old in my Datsun , '70 truck. In that one I did notice lack of power and the smell of old gas.

Answer 3

Stored fuel goes bad in as little as 60 days causing varnish deposits and corrosion to build up in engines.
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