On Dec 12, 11:50 am, "Dan Luke" wrote:
"Denny" wrote:
Fly often, use avblend...

CamGuard

http://www.aslcamguard.com/antiwear.htm

http://www.aslcamguard.com/humiditycab.htm

As the thread morphs:

That's interesting, Dan... I would like to know what additive A and B
are... I would also like to see the testing done by an unbiased
source... There are also other factors in real engines: drainback
resistance, anti rust, etc...

I am wary of additive claims... I use 15W50... I only came to adding
avblend kicking and screaming out of necessity... My port engine
(500 smoh) suddenly developed signs of morning sickness, culminating
in a stuck exhaust valve (during the flight to the mechanic for the
annual, no less)
This was quickly and smoothly solved in the usual fashion by an old
timey mechanic - who has done many of these over 40+ years in the game
- without having to take off the jug...
About 3 months after that it began showing slight signs of morning
sickness again (not necessarily the same valve)... I discussed this
with the mechanic I had purchased the plane from... He laughed, and
said they had fought with sticking valves for decades in their rental
aircraft (especially the C-150's)... When they finally made the
decision to try avblend (it is expensive, esp. when you are dumping it
into a half dozen airplanes) it was only after much discussion and
arguing... But, they never had a stuck valve on their planes after
that... So, I sprung for a case of the stuff and I have not had a
problem since...
Anecdotal? Yes.
But as one poster has on his sig, "Absence of evidence is not
evidence of absence."

denny