Anyone out there happen to know what the shelf life of Gumout fuel injector cleaner (poorly stored in high temps) is likely to be? I was out of the country for 5 years and left this with a friend expecting he'd use it... he stuck it in his attic, which I expect was well into the 120F range for 5 summers.
It's not that I'm so cheap I refuse to buy another bottle - I just hate to waste stuff. I'm not so much concerned with how effective it might be, I'm more concerned with whether there might be any detrimental effects to the fuel system after sitting for so long. Anyone out there know enough about the chemical composition of this stuff to comment on whether it might be harmful to just dump it in the tank?
Oh, it's still sealed and looks normal as far as I can tell.