I was told the red-diesel is the exact same as on-road, only plus the dye. Just make sure you have a fuel additive on-board your truck that turns your fuel the same color.

I wouldnt recommed it for cutting business costs though. A trucking company here in Washington just went Bankrupt because one of there trucks was caught using the untaxed red-diesel. Which then prompted the SP to have all the trucks checked, which revealed all were running the red diesel. Total fine was something like $400,000. Maybe more?