Based on some reading, there may be 2 different types of Stabil. I use Stabil for my gas engines. I just checked the bottle and this one is for gasoline or gasoline/ethanol blends only. There could be a separate one for diesel, but I've never seen Stabil for diesel.
John -- I do know that several of the school districts in Rochester have converted their busses to the DPF systems to reduce emissions (state grant), so they are using ULSD. The fuel filters gelled up during our late January cold snap, causing the busses to not run. After some research, the districts did something to the fuel to prevent the gelling, but I don't know what they did.