I just bought an 02 (LB7) and the guy before me added a slip tank that feeds directly (via a simple filter) into the filler neck. We have recently had weather from -30 degrees celcius to +10 degrees currently and I am worried about condensation as the tank (270 litres) has been empty for the last month or so. I am considering putting some sort of additive and some fuel in it just to take care of any possible condensation so if someone in my area (Alberta) knows of a good product that I can get locally, I would appreciate it. Another thing I have considered is to add a good secondary fuel filtration and water separating system. Any feedback would be appreciated.

Highmiler
02 LB7 6 speed manual. Bone stock except for a hypertech tuner.:chevy:

I use Power Service in my diesel rigs, no problems over many years and several vehicles. There shouldn't be too much condensation to worry about, but you could up the rate of the treatment if concerned. Stay warm!!