Re: how long does it take for gas to get old?
 

that adds 0.1 octane

Re: how long does it take for gas to get old?
 

I at least wouldn't risk old gas on a high performance turbocharged engine. A tank of gas = $20, a blown up engine = $2000.
A good way to dispose of old gas is to put 3 gallons at a time into your mom's accord every now and then.

Re: how long does it take for gas to get old?
 

when my jag broke down, it was sitting outside in the hot Socal sun for a year. Then gave it to my auntie, and it started up. Damn I was pissed.

So yeah it should be fine, Personally I would go toss in some 91 octane gas in ther just to mix it up some.