I've seen a few posts on fuel quality but my question takes a slight twist.<br /><br />My understanding is that upon vaporization, a higher concentration of the fuel by-products are left which becomes unfriendly to normal motor operation. <br /><br />Since fuel vaporizes most with higher barometric pressure in warmer climates I would conclude that it vaporizes least in cooler climates and therefore maintains quality for longer periods of time.<br /><br />I was thinking of using the fuel in my boat which received a double dose of conditioner and diluting it with fresh fuel I burn in my car when I take the boat out of winterization. Temperatures here in NE Pennsylvaiia are fairly cool (below 40 degrees) for at least three consistent months. Just wondering if this would be prudent or not really necessary.<br /><br />Helpful thoughts appreciated.