Check out (Diesel Cold Flow) on National Synthetics http://bit.ly/2CHelta
Using #1 diesel fuel is one solution to cold-weather diesel fuel problems. While #1 diesel fuel has an advantage in low-temperature operability, its energy content is about 95 percent that of #2 diesel fuel, resulting in reduced fuel economy and less horsepower. Plus, it costs more. Instead, use a fuel additive like AMSOIL Diesel Cold Flow that reduces cold-weather diesel fuel issues and minimizes the need for blending standard #2 diesel fuel with #1 diesel fuel.
Diesel Cold Flow
AMSOIL Diesel Cold Flow (ADD) combats diesel fuel gelling by improving diesel cold-flow ability. It is formulated with an advanced deicer to enhance fuel flow and help prevent fuel filter plugging in cold temperatures.