Matt Barrow wrote:
"Allen" wrote in message
. com...
...
Jay Honeck wrote:
Hmmm. Let's see. Shall I believe the guy who runs a multi-million
dollar aircraft exhaust system business (and has no incentive to lie to
me), or shall I believe Usenet?
"Frank Stutzman" wrote in message

Teledyne Continental and (I think) Lycoming have both gone on record
to say that mogas is damaging to their engines. They are certainly
multi-millon dollar aircraft engine companies and have have no
incentive to lie to you.
They are also multi-million dollar aircraft engine companies that
recommend against LOP operation. (Unless you are running a FADEC system).

Have they ever shown you or anyone else REAL DATA?

No? Gee, why not?

Yes, like Lycoming who recommends 50ROP. Got any idea what THAT will do to
your valves, heads, exhaust system?

Oh, and Columbia recommends LOP for it's IO-550'ed 400 model.


Mirage/Malibu models with certain engines need to be ran LOP, per the
POH, too.

From what I've been reading on the Mooney list by Walter Atkinson, LOP
is a Good Thing, and even doable on carbureted engines (one needs to
play with the carb heat setting, an engine analyzer and a carb temp
gauge are de rigueur).

-jav