[thackney]

and is in fact made from waste products of NG and gasoline refining

Co-products, not considered waste at $55~60/barrel for the wholesale price and $120/barrel for the final sale price.

http://www.eia.gov/dnav/pet/pet_pri_wfr_a_EPLLPA_PWR_dpgal_m.htm

http://www.eia.gov/dnav/pet/pet_pri_wfr_a_EPLLPA_PRS_dpgal_m.htm

Some wells are being drilled for natural gas liquids like propane, butane and consider the Natural Gas as a side product.

[Beagle8U]

OK, co-product then, it is still cleaner and cheaper than fuel oil, and requires no pipeline to your home.

Buy your own tank and you can shop around for the cheapest price, rather than being tied to one company and tank rental and bloated prices.