Diesel fuel no. 1 is a lighter, more volatile fuel that is used in cold weather climates. It has a lower cetane number than diesel fuel no. 2, which means it ignites more easily at lower temperatures. Diesel fuel no. 1 is also more expensive than diesel fuel no. 2.
Diesel fuel no. 2 is a heavier, less volatile fuel that is used in warm weather climates. It has a higher cetane number than diesel fuel no. 1, which means it ignites more easily at higher temperatures. Diesel fuel no. 2 is also less expensive than diesel fuel no. 1.
Off-road diesel fuel is a type of diesel fuel that is used in non-road vehicles, such as tractors, bulldozers, and generators. It is typically dyed red to distinguish it from on-road diesel fuel, which is taxed at a higher rate. Off-road diesel fuel is also exempt from some of the emissions regulations that apply to on-road diesel fuel.
So, to answer your question, off-road diesel fuel is not the same as diesel fuel no. 1 or no. 2. It is a separate type of diesel fuel that is used for specific purposes.
