Bobby, like Brad said, if it was sealed up, more than likely it is ok. Any gas, VP, av gas, or even regular gas will go bad fast if it is left open. It will vaporize and all the light ends will leave. In the leaded gas, the lead can fall out if exposed to the air. Also, uv's will kill gas real quickly. If you leave your race gas in a clear plastic jug, it will go away even if it is sealed. The plastic will allow it to vent thru the plastic. Ever notice how you can not keep decals on a plastic gas tank.
I would run it in your lawn mower, weed eater, go cart or what ever. But do not run it in something with a converter. I run leaded gas in my lawn mower, rototiller, welder and weed eaters. They may sit for a long time and will always start right up. Also, I didn't say this, but it is good for killing fire ants and killing weeds along the chain length fence.