Offered as opinion, with full respect to the experiences of others:
The link above appears to say the same things about that particular stabilizer as other brands of stabilizer say about themselves in that it works to delay the loss of volatile elements in stored gasoline so that the gas remains 'fresh' for a longer period. It makes no claim that I could find, that adding it to old gas will restore these elements and in truth it's hard to imagine how it could do so. Adding stuff to old stored gas in order to fix it seems like closing the barn door after the horses have gone, to flog that old metaphor a bit more.
But if it does, as a rank amateur non-chemist I'm willing to be surprised, and educated.
My experience with the CF Moto and stored gas, is that to my shame and blame I am guilty of locking up my SXS over the winter months without having added stabilizer to the 87 octane 10% ethanol gas in it. As I use the quad to plow, the SXS sits neglected for 4 months or so, and so far I have not experienced any adverse effects in running due to the gas being old, in fact it spins and starts as though it were parked yesterday. I'm not advocating this level of care, just saying this is what happened.
Of course gasoline retailers in different jurisdictions add additives to suit their markets, regulations, and brands and this comparing my gas to yours might be comparing apples to oranges but a few of months old gasoline doesn't make my 800 run poorly, is all I'm trying to say.
