While straight gasoline does degrade over time it is not that noticeable for ordinary uses. Alcohol blended gasoline is a different story entirely due to the alcohol's ability to absorb water. E10 Gas has a shelf life of only 3 months. read more
100% gasoline if kept in a cool place and in a container that is tightly sealed or closed, should last about a year or so, but if it is fuel mixed with ethanol then the shelf life will be drastically reduced. read more
If it is airtight in a clean, stainless steel container with little oxygen, and is periodically stirred, gasoline will last a very long time. Many years, if not indefinitely. The problem is that gasoline is never stored in that kind of container, so it does go bad. read more
The shelf life of gasoline depends on the type of gas and the storage conditions and can range from a couple months to a couple years. One wild card is that gas you buy at the pump may already have been in storage for anywhere from days to months. read more