Percy Pwood Georgia Wood wrote: > > Howdy, Syd. > During the annual before last, the IA said that my `coupe should be > placarded with the fuel grade in the Pilots Operating Handbook. My POH > says 73 minimum octain. The IA has the opinion that the STC-by-mail for > auto gas is a scam, as it is perfectly legal so long as it meets the > above requirement. > In the Pacific NW there is 80-87. I burn that and avoid the 100LL. > Percy in Portland
Unconfirmed comments I heard several years ago were:
The 73 octane referred to in the original type certificate was
measured
in a different way than is used now for gas-pump labels.
That 73 octane, I was told, comes out to be a higher number in
current
numbering system. Specifics were given, but I don't remember them.
Your mechanic does have an interesting point, though. Oh well, <sigh>
I've already got the autofuel STC so I'm legal under that system. It's
quite easy to get 87 octane that purportedly has no alcohol around
here. I do test it to be sure it really doesn't have alcohol, just to
be sure.
--
Ed Burkhead
East Peoria, Ill.
N3802H, 415-D
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