[Capt Kirk]

I only have a couple years of experience with lower 48 gas...Alaska gas doesn't do what you described. I've had gas problems with my small lawn and garden equipment after wintering over. My vehicles have seemed to have done fine over winter. I don't know about a year and a half. I would suspect that if the fuel is "amber" it has changed...might run ok but not the best. If it was me, I'd drain the tank and bowl and use that gas in a lawn mower or something else that I didn't care much about. It's $25 worth of gas...treat your car right and your lawnmower like crap!