mixing 80 and 100 and autogas...?

[R. Wubben]

Reviewing some of the old posts on rec.aviation.owning, it appears
that the conventional wisdom is that mixing of the gases is ok.
What I foresee is that I can get 80 at my home field, but will need to
top off or completely fill up with 100LL as I go along. Is this truly
ok?

Are people still adding TCP to their tanks when using 100LL even if
they have a partial load of 80 on board?

I'm trying to avoid ever having a stuck exhaust valve again, but the
reality is that 80 is hard to find and autogas is frequently not an
option (depending on the airport).

Thanks,
Ryan

[Jay Honeck]

> What I foresee is that I can get 80 at my home field, but will need to
> top off or completely fill up with 100LL as I go along. Is this truly
> ok?

Yes.

> I'm trying to avoid ever having a stuck exhaust valve again, but the
> reality is that 80 is hard to find and autogas is frequently not an
> option (depending on the airport).

Build a fuel truck. See mine at
http://www.alexisparkinn.com/fuel_truck.htm .

It's saved me over $3000 in fuel costs, and the plane runs much better, too.
--
Jay Honeck
Iowa City, IA
Pathfinder N56993
www.AlexisParkInn.com
"Your Aviation Destination"

[PlsurFlyin]

You have 80? Send me a truckload...

[R. Wubben]

Well, I may just have to do that. I just found out the big tank at
Waunakee, WI (my new home) labeled "80" is actually full of 100LL...

D&%N!!!
Double D#$N!!!

Back to square one. Now, do I use MMO or TCP...?

[John Harlow]

> Are people still adding TCP to their tanks when using 100LL even if
> they have a partial load of 80 on board?

Are people able to actually get TCP from anywhere?

[Bob Fry]

(R. Wubben) writes:

> I'm trying to avoid ever having a stuck exhaust valve again, but the
> reality is that 80 is hard to find and autogas is frequently not an
> option (depending on the airport).

I flew my Aircoupe with a Continental C-90 from California to Oshkosh
last summer. At home I feed it 80/87 or mogas, but on the trip it got
100LL. It needed to be leaned more carefully, but otherwise ran OK.
As soon as I got home I started giving it unleaded gasoline again.
Quit worrying and start flying.