FYI: #2 heating oil and diesel are pretty much the same thing, the only differences being dyes in the heating oil (since it's often taxed differently) and additives in diesel (for example in the winter to stop it waxing up in the cold). Not sure about sulfur content differences when comparing #2 to the low sulfur diesels you see, but I doubt a few hours of burning higher sulfur fuel will do anything.

Also, #2 heating oil is cheaper than diesel in New England, it's about $3.70/gal.