Leaning for taxi

james rosinski wrote:

Jay Honeck wrote:

What do folks think of this procedure? Can it harm the engine? It's a
Lycoming O320-D2G in a Skyhawk. Thanks in advance.

Can you get the autogas STC for that engine?

No, the D2G engine is higher compression and requires 100 octane. The
upside is you get 10 more horses (160 vs 150).

Petersen has an STC for the Skyhawk with the O-320-D2G.
http://www.autofuelstc.com/autofuels...nAviation.html

George Patterson
If you want to know God's opinion of money, just look at the people
he gives it to.

G.R. Patterson III wrote:

Petersen has an STC for the Skyhawk with the O-320-D2G.
http://www.autofuelstc.com/autofuels...nAviation.html

So they do! Thanks for the pointer. Interesting reading--no ethanol
blends are allowed, and the STC for the D2G engine requires a minimum 91
octane rating. Reading the descriptions of airframes/engines that failed
certification tests due to "failed the vapor lock test" causes some
concern, particularly for the high altitudes I must often fly at.

Since self-serve 100LL is only $2.45 at my home base, the cost savings
of using premium mogas in a Skyhawk would be minimal. But it's nice to
know a simple STC is available in case the unthinkable happens--sources
of 100 octane avgas drying up.

N.B. there are LOTS of engine/airframe combinations mentioned on the web
site.

Jim Rosinski
N3825Q