Actually NO Avgas (commercially available in the US) is unleaded. Avgas is rated via "MON" (motor octane number - the fuel is actually run in a test fixture at increasing RPM until detonation occurs) vs. AKI for pump gas (anti-knock index i.e. MON+RON/2).
BTW, you're not quiiiite right about Avgas. Testing fuel via MON typically results in a lower number, while RON (research octane number - a basic study of the molecular makeup of a particular batch of gas) a higher. Lets just say there's a 10pt spread between the two (about normal). So 93 octane at the pump would be 88 MON and 98 RON. So, to compare apples to apples, auto gas is 88 MON vs. 100 MON in Avgas. Also, Avgas is tested at both lean and rich AFRs, and the octane rating is just that achieved at a severely lean AFR (i.e. in a proper mixture the octane is actually 130 - in fact the designation for the fuel used to be 100/130 to reflect this), vs. pump gas which is just run at one "ideal" AFR. As an aside, this is why fuel in Europe always seems to be a higher octane - they only rate it as RON.
Even though it is advertised as 100LL (low lead) its still got a f*ck ton of lead in it by modern standards. It will PUNISH a cat/o2 sensor if run for any length of time. It's just low compared to 1970's standards when it was developed. One nice thing about it though, AvGas is 100% ethanol free, if you're worried about that kind of thing.
BTW, I'm a pilot and hobbyist/part-time A&P (airframe and powerplant mechanic) apprentice (it typically takes 30 months of apprenticeship if you do it full time to become certified
) slowly preparing for my FAA oral exam :pimp:
Heh, ever been down to the races in Forest, VA? Its an airport AND a dragstrip on Sundays. Good times flying there.
BTW, hope those parts are working out well for ya.
BTW, you're not quiiiite right about Avgas. Testing fuel via MON typically results in a lower number, while RON (research octane number - a basic study of the molecular makeup of a particular batch of gas) a higher. Lets just say there's a 10pt spread between the two (about normal). So 93 octane at the pump would be 88 MON and 98 RON. So, to compare apples to apples, auto gas is 88 MON vs. 100 MON in Avgas. Also, Avgas is tested at both lean and rich AFRs, and the octane rating is just that achieved at a severely lean AFR (i.e. in a proper mixture the octane is actually 130 - in fact the designation for the fuel used to be 100/130 to reflect this), vs. pump gas which is just run at one "ideal" AFR. As an aside, this is why fuel in Europe always seems to be a higher octane - they only rate it as RON.
Even though it is advertised as 100LL (low lead) its still got a f*ck ton of lead in it by modern standards. It will PUNISH a cat/o2 sensor if run for any length of time. It's just low compared to 1970's standards when it was developed. One nice thing about it though, AvGas is 100% ethanol free, if you're worried about that kind of thing.
BTW, I'm a pilot and hobbyist/part-time A&P (airframe and powerplant mechanic) apprentice (it typically takes 30 months of apprenticeship if you do it full time to become certified
) slowly preparing for my FAA oral exam :pimp:Heh, ever been down to the races in Forest, VA? Its an airport AND a dragstrip on Sundays. Good times flying there.
BTW, hope those parts are working out well for ya.
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