For heavy duty truck fleets, the winter months are more than just that risky season when they have to be extra careful in driving. As fl eets prepare for the harshest season for trucks, the question of MPG performance, disruptive breakdowns, fuel supply and how to effectively treat fuel that can be used in cold temperatures emerge. This whitepaper outlines winter’s effect on MPG and explains how to prevent delays due to winter fuel problems without compromising MPG performance.