Originally Posted by netboy
It's probably not that critical, but as long as it's not a major nuisance, I prefer doing it the right way.
I generally concur; however, the "open bottle in cabin" issue is a pain, especially on road trips. Even the smallest PSDK bottle is a double-dose when used on a single tank. The larger, more economical bottles are even more (next size up treats ~5 tanks at standard dose).
If there is a good way to seal up the stench (perhaps that gasketed ammo can will suffice) then I agree it would be ideal to follow the "dose at the pump, then refuel" approach. Barring that when not traveling I have been known to refuel, drive home, and dose the tank before I go to bed. I think the fuel pump can even be cycled if so desired without turning on the vehicle.
But yeah, smell of PSDK in the cabin is the limiting factor for me. Even in small amount it's an unpleasant aroma, unlike diesel or gasoline.