Just fueled up with straight #2 fuel , added 3oz. B g fuel additive . Went 140 miles . 12 above zero . Averaged 20. 4 mpg
If you saw how the fuel arrives in the pipe lines and how it is treated before it is delivered and how bad some of these stations tanks are you would see WHY using additives every single tank is imperative.
Don't buy into the fairy tale that all is needed is good clean fuel because that language does not exist. Cummins and Bosch have both adopted a FUEL QUALITY standard and the only way to meet the standard is additives and extra filtration. Unfortunately, that is on you to maintain because its a good bet 95% of the diesel sold by retailers will NOT meet the standards.
As a rule, those trucks having the longest life of fuel system components and the least problems are in fact running additives and additional filtration. Where you are at it would be no question using additives every tank this time of year. In addition, better filtration plus water seperation with an additional fuel heater would be a really good idea.
What part of SD do you live in?