Why is it that when a company has developed the world's "greenest" light aircraft at a time when environmental issues are a political hot potato, it is effectively penalized for its work? Sweden's Lars Hjelmborg couldn't tell you. His company, Hjelmco Oil, has led worldwide unleaded fuel development and production for decades. Hjelmco's 91/96 avgas is approved for use in most Textron-Lycoming engines up to 180 hp, as well as the 235- and 260-hp O-540s and all Continental 100- and 145-hp engines.Other than environmental considerations, there are compelling reasons the GA community should investigate using unleaded avgas. Says Lars, "Avgas is the only leaded fuel amongst unleaded fuels in the modern world. Companies have to isolate all of its handling, which increases costs. It is inconvenient to hire a ship to transport 100LL. You have to find a tanker where the next cargo can accept lead, e.g., a lubricant. You may not find a lubricant producer at the destination and have to return an empty ship. This pushes fuel prices up."
This is a companion discussion topic for the original entry at https://www.avweb.com/features_old/across-the-pond-2-fuels-to-ourselves