<VV> Higher Octane Fuel

henry kaczmarek kaczmarek at charter.net
Sun Jul 9 19:12:35 EDT 2006

Hi Bob
This comes up from time to time.

The short answer is that you're cheating the government of taxes when you 
put AV gas in a car.  If you cheat on your income taxes as most Americans 
do, though they won't admit it.... it's not nearly as large a deprivation of 
your cash to the government.

As long as it's going into a vehicle that is off-road (like dirt track or 
other race cars that aren't ever run on the street), or a car built before 
1973, technically you're aren't damaging the environment, or messing up the 
02 sensor and converter.

Are you breaking the law?  Since it's something you don't have to do every 
time you re-fuel---a couple times a year is more than enough--I let everyone 
tend their own garden.

----- Original Message ----- 
From: <BobHelt at aol.com>
To: <corvair at mts.net>; <virtualvairs at corvair.org>
Sent: Sunday, July 09, 2006 6:52 PM
Subject: Re: <VV> Higher Octane Fuel

> In a message dated 7/9/2006 3:08:27 PM US Mountain Standard Time,
> corvair at mts.net writes:
> Actually, 100LL Avgas has *fewer* additives than car gas - oil  companies 
> are
> restricted on what can be added to avgas by FAA regulation - so  no 
> ethanol,
> MTBE, etc. will be found, just good 'ole tetraethyl lead. 100LL is  just 
> 'low
> lead' compared to higher octane avgas that used to be available  (like 130
> etc.) but still contains more lead than premium leaded auto gas.  Your 
> valves
> will love it but watch your spark plugs carefully and don't use it  to 
> wash your
> hands (despite how nice it smells compared to modern  fuels).
> Also, vapour pressure (volatility) of avgas is much lower than  auto gas
> (wouldn't want your Cessna to vapour lock at 18,000 feet) so you may  have
> starting problems in cold weather.
> Make sure your avgas is light  blue (colour coded 100LL) instead of red
> (coloured  80/87).
> Les
> 'Scuse me, but isn't it illegal to use av gas on the roads and highways
> without paying the necessary taxes? And is leaded gas legal on the 
> highways?
> Or are we suggesting it is OK to break the laws now?
> Just wondering.....
> Regards,
> Bob Helt
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