Boncosky Oil Company
- Distributes industrial petroleum products, automotive and commercial lubricants, fuels, distillates, and other related products throughout Northern Illinois. Locations in Belvidere and Elgin.
- http://www.boncosky.com/

Illinois Propane Gas Association
- Trade organization for the industry and the general public. Lists marketers who can supply propane gas, training programs, consumer information and contacts..
- http://www.ilpga.org/