Office of Steam Forum for Model & Toy Steam Gas & Hot Air Engines

Quote from: RedRyder

You can also use 100 LL which is 100 octane low lead aircraft fuel

poisonous additives

Technically Avgas 100LL has poisonous additives, namely TEL. Even thought it is 'Low Lead' it still contains it, so i do hope you run these engines in a well ventilated place when using 100LL Gil. Plus i'm surprised you haven't had any issues with lead fouling the spark plugs on these engines when using that fuel.

Hi Swift Fox, and thank you for your insight. It is not lead that fouls spark plugs. If this were the case it would not be deemed suitable for aviation use. Improper fuel/air mixtures and weak sparks are the main culprit with fouled plugs. A little clean burning 100 LL in my opinion, when used in a tiny hit and miss engine, is likely considerably better to breath than than poison we burn in our automobiles. Still.... all gas engines big and small should be run in a properly vented area or outdoors. Aircraft fuel blends also have greater evaporative qualities in cool environments than automotive fuels.

Gil