"Coleman fuel has an octane rating of 50 to 55 and none of the additives found in modern gasoline.[2] It has a lower molecular weight than gasoline, kerosene and diesel fuel and cannot be used as a substitute for any of those fuels in modern engines.[2]

The flammability of Coleman Fuel is similar to gasoline; however, it should never be used in modern era gasoline engines. Its high heat of combustion and lack of octane boosting additives like tetra-ethyl lead will destroy engine valves, and its low octane rating would produce knocking.[2]"

reference [2] above = see below
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(see #2 for Coleman's opinion of hte different fuels)


depending on where you live, you likely get a slightly different blend of gas, and slightly different from each company - i.e. shell vs mobil vs conoco      ---   Here in Colorado, they use alchohol or MTBE for "winter" blends to keep the air cleaner - not sure if MTBE fumes would be particularly good for you, but I'd guess not (most stations use an alchohol mix)  - I would guess that California gas would be different yet with thier more stringent air quality requirements, but maybe not

I have one dual fuel Coleman stove, but I've never run gas station gas in it, always using Coleman Fuel instead, on the assumption that it is "cleaner"

I guess you could think that is just a marketing ploy if you like, or not