Off-road diesel fuel or ultra-low sulfur-dyed diesel fuel is dyed red for tax purposes. Off-road diesel fuel is used only for off-road machinery like farm tractors, backhoes, bulldozers, cranes, bobcats, generators, and more. Jacobs Oil Company Inc. strictly adheres to governmental regulations regarding off-road diesel fuel. It is illegal to use off-road diesel fuel in a licensed vehicle and farm vehicle that operates on a road. Let Jacobs Oil Company provide you with on-road diesel and off-road diesel.