up here in canada, they put the additives in the fuel to keep it from gelling before it gets to the fuel station, don't they down there?
Same down here in the states. The fuel brands use different packet additives which are added at the fuel racks when the tanker takes on a load for delivery. See my reply on this thread on 6-24-'21 at 7:59 am about using one fuel supplier vs using different fueling stations which most owners are doing.
WE did have a forum member some years back who drove a fuel tanker and gave us insight on the packets....and sometimes those packets didn't get added.
I get a kick out of filling the fuel filter container on my '03 Dodge/Cummins with Power Service (white jug) when changing fuel filter. Crank it up and its so quiet and a big boost in seat of the pants performance for 5-10 miles.
My '03 Cummins HO just turned over 361k miles. I use mostly Power Service or Howes several times a year in the tank especially when I buy fuel from one source near me most of the time. I like how much quieter/towing performance the Cummins runs... till that tank is diluted with refills.