> > > Paul,
 > > > I change oil in my car each year when getting my yearly inspection.
 > > > Have been using Mobil 1 for over thirty years.  Did a valve job on

my

626
 > > > some years ago
 > > > and the mechanic who did the grinding for me asked what type oil I
used
 > > > as the valve stems were and guides were worn less than .0005.  This
was with
 > > > 113000
 > > > miles on the car.  He immediately switched to using Mobil1 in his
 > > > vehicles.
 > > > I will not say I'm using it in my 0-235 since new.
 > > > Fly fast, land slow.
 > > > Bill

 > > I think due to its higher temp capability it would be ideal for valve
 > > guide lube. Here is that valve temp chart again. Course auto engine
 > > valves stems run a lot cooler than aircraft engine valve stems.
 > > That is one reason they don't cost $100 to $300 EACH!
 > > It is a wonder to me air craft engine exhaust valves last
 > > as long as they do.
 > > Paul

 > Hi guys! Good to be back for a while... ;-(
 >
 > Getting caught up on messages. And this one caught my eye.
 >
 > DON'T RUN MOBIL1 WITH AVGAS!!! YOU WILL SUFFER BLOCKED OIL PASSAGES AND
ENGINE
 > FAILURE!!!!
 >
 > Mobil1 will not properly disperse the lead left in the engine from

blowby

gasses.
 > Standard old crappy oil and semi-synthetic blends (run 50%/50% might

work..

..) will
 > chemically react with the lead compounds and suspend it properly till

oil

change. I
 > would guess if you are flying with mogas this is a non-problem.
 >
 > This is why it got yanked off the market after a few accidents proved

this

sorry fact
 > out.
 >
 > I run 15w-50 all year long in my bikes and cars.
 > Blake

 Come to think of it I vaguely heard that someplace.
 I forgot about that Blake. Thanks.
 Too bad.

 Paul Lamar

Was it Mobil One or a Shell synthetic that was being sold for Aero use? I
think it was Shell --- may be a moot point, because Mobil One was designed
and sold for automotive use only. However it was introduced when there was
still some lead in Motor fuel. Did it have problems then?

Is the problem that of the increased blow-by of aviation engines compared to
automotive engines?

Bill Schertz
KIS Cruiser #4045

 
The AirCraft Rotary Engine NewsLetter.              Powered by Linux.
ACRE NL web site.
http://home.earthlink.net/~rotaryeng/            http://www.linux.org