I keep a can mixed, and every 2 or 3 years I have to mix some more. I've
heard that, but never found it to be true. Keep the lid on the can tight.

"Joe" wrote in message
...
I was advised to always use gasoline that hasn't been sitting around
too long by the repairman when there are problems starting it up.
Does the fuel lose it potency after being mixed with two stoke oil and
if this is so, how long before it needs to be discarded?