Stoddard Solvent is basicly Mineral Spirits:
http://en.wikipedia.org/wiki/Mineral_spirits Also works but doesn't cut the grease as well as kerosene and is not avalable in bulk so it's more expensive. Kerosene in gallon cans at the retail outlets is about $10+ a gallon, I would suspect the Mineral Spirits is about the same.
Gas has a much lower flash point than Kerosene and the fumes are much more likellly to ignite aroond an ignition source such as your funace or a welding operation. That's one of the reasons that I switched many decades ago.
Tractor Supply has what a lot cheaper Brian, Kerosene, Gasoline or Mineral Spirits?
DG