Primrose FlowMaster 409: six 12 ounce bottles:

For use in diesel winter operation. FlowMaster lowers the pour point of diesel fuel by 20 to 30 degrees! Plus 409 contains cetane improver, injector cleaner, rust preventive and water emulsifier to prevent free water damage and microbe growth. A 12 ounce bottle treats 100 gallons of diesel fuel! The ultimate in winter protection plus the performance enhancement of regular PowerMaster! Six 12 ounce bottle case. For use in colder climates not to gel you diesel fuel!