Six months give or take. But I've had a can for my mower and that thing gets filled up every couple of years and the mower runs fine.
The top and doors on this vehicle are designed only for protection against the elements. Do not rely on the top and doors to contain occupants within the vehicle or to protect against injury during an accident. Wear seatbelts at all times.
sta-bil is good stuff. put some in the generator after hurricane katrina. didn't expect it to actually keep the gas good, just didn't want it to get/gum up. hurricane gustav rolls around (YEARS later) and i fired that generator up on the same gas.
FWIW though, why don't you just fill your tank with the gas cans when your at the pump and then top off the tank and refill the cans at the same time?
I had 5 gal of gas sitting in a can for about a year...I forgot it was there. I found it about the time gas prices were going through the roof last year and couldnt stand the thought of wasting it. I used it in my lawn mower all summer and didnt have any trouble....probably just lucky. I figured if it killed the lawn mower so what.
I have one Jerry can I always keep around and take with me on off-road trips. The longest I have ever let it sit was a month. I usually put it in my fuel tank when I refuel then put new gas back in the can.
Gotta cycle it.
I've heard good things about those gas stabilizers though. FWIW.
I use Sta-bil in my boat all the time. never had a problem with it starting in the spring. it's supposed to stabalize fuel for 1 year. I add it to my lawn mower gas tanks also, more in the fall so the fuel tanks in the weed eater, chainsaw, tiller and mower/tractor have it for the winter.
Gas degrades very quickly from what I read, 2-3 months. I use stabalizer all the time. When I store a seasonal engine I add fuel stabalizer and run engine till it runs out of fuel. Keeps what is left inthe bowl and lines from gum up. If the tank is metal I leave it full of stabalized fuel so it doesnot rust. Still need to run the stabalzied fuel tru the engine. I store my CJ in winter and put stablizer in the fuel tank before storage. The stuff work and is well known.
Stablized fuel is good for like 1 yr max but have heard more. For the extra gas tanks use stabalizer and rotate the fuel every spring and fall.
I have used stabil in a lot of stuff. so i didnt think twice about using it in my seadoo. last spring i could not get it to run worth a crap. i ended up draining the tank and putting fresh gas in it. the seadoo is supercharged not sure if it didn like the stabil are what any ideas.
Good stuff, I was hurt and could not ride the motorcycle for over a year, I used it and it was good to go and it has six carbs on it.
Any gas stored will lose some octane quality, if it has been stored a while just add a little octane boost to it to bring it back up.