I'm here Ed. Appreciate your consideration given you were inadvertently set
up. The original post is below. You will note the paragraph above the section
you read talks about negative effect of EXCLUSIVE use of av fuel. Also described
with "this happens every 20 hours".
<<Al- just let me in on the system for the auto engine logistics- do
all the FBO's serve up auto fuel?
Auto fuel relatively difficult to find at airports. You can do web search
for all the ones within flying distance. I planned my flight from west coast to
Osh last year. Two different routes. With the cruise range of the Cozy it was no
big deal to buy auto all the way. I recall one location I'd have to buy a
few gallons of aviation fuel.
In the past, auto engines would notice slight rpm drop during cruise
if they exclusively burned aviation fuel. Week after week it would increase. If
they ran one tank of auto fuel, it would fix itself until around 10 avgas tanks
later. They now use Marvel Mystery oil of all things, and it reportedly
eliminates all negative effects. Marvel better than 2 other lead
scavengers.
<<Do the rotory fliers carry chain saw oil mix with them when going
cross country to pour in their tanks after a fill up?
Rotary is different issue. Their unusual combustion chamber
requires them to mix 2 cycle oil with each tank. If they don't their compression
seals die prematurely. Just like your boat motor mix, I don't see it as a big
deal. In addition, if they use aviation fuel, they develop power drop on
departure and have to replace all their plugs before next flight. This happens
every 20 hours. They don't have solution for this.
<<somebody said they were using jerry cans of auto gas and
bringing them to their hanger to fill up their tanks- is this right?
I find almost all my flying is from home base, returning later that day. So
I fill (3) 5 gallon cans at gas station 1 mile away from airport. While I'm
doing preflight, these drain into my mobile 30 gallon tank. I then wheel it over
to the plane and it takes 20 seconds to fill tank. (compressed air transfers it
very rapidly). Neat trick I learned from motorcycle buddy. No more inconvenient
than taxiing over to HBO to get fuel, way less expensive.
If I don't value auto fuel savings, just add some Marvel each av tank,
off I go.
-al wick