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09-22-2011, 04:08 PM
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Join Date: Dec 2010
Location: Greeley, Colorado
Posts: 199
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Oil Additives
How many people are running 'Marvel Mystery Oil' in their Lycomings?
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John D. Artz, EAA 71811, 100+ Young Eagle flts
Adopted Dave's 6A
MXL Ultralight, only bleeding after 3 landings
Scorpion Two Helicopter, big mistake
PA-28 and 210E Centurion
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09-22-2011, 05:35 PM
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Join Date: May 2005
Location: Santa Barbara, CA
Posts: 1,324
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Snake Oil
Search "Marvel Mystery Oil", you will find plenty of reading.
John Clark ATP, CFI
FAAST Team Representative
EAA Flight Advisor
RV8 N18U "Sunshine"
KSBA
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09-22-2011, 07:45 PM
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Join Date: Jan 2007
Location: Stuart, FL /Hartford, CT/Virgin Gorda,BVI
Posts: 3,122
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in the fuel & oil.
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TURBO YES =VAF= Payed Jan2019
Ed D'Arcy
RV6-A 5,200+ hrs, R-44 1,600 hrs, Helicycle 320 hrs, gyro sold,35,000 miles flown in 2015 
Stuart, Fl / S WINDSOR,Ct / Virgin Gorda, BVI - under major repair from hurricane damage
VAF #840 EAA AOPA FAC FABA QB SPA
addicted pickle ball player
https://i.postimg.cc/tn3h4svg/IMG-3101.jpg
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09-22-2011, 08:13 PM
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Join Date: May 2005
Location: Santa Barbara, CA
Posts: 1,324
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Not wanting to rehash all of this, here is a response from Milt from over a year ago. Draw your own conclusions.
http://www.vansairforce.com/communit...19&postcount=2
John Clark ATP, CFI
FAAST Team Representative
EAA Flight Advisor
RV8 N18U "Sunshine"
KSBA |
09-23-2011, 04:53 AM
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Join Date: Jan 2005
Location: Louisville, Ga
Posts: 7,840
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It has other usues.
When I ran 1340 cu. in. Pratt @ Whitney engines, they'd sometimes suffer a stuck valve and we'd attach a plastic line to the intake and feed MMO while the engine was running and smoke the whole airport with clouds of blue  More often than not, the valves would unstick and we'd be on our merry way, so I became a believer in MMO for THAT purpose, because it worked.
Last year, I squirted MMO in a Honda lawn mower's cylinder that had sat idle for 5 years and left it overnight because the engine was "frozen" and let the MMO penetrate the rings and lands. Yep, two days later, it freed up and actually ran! The carb had to be disassembled and ungunked but we're using the lawn mower and my wife loves its easy starting.
It (MMO) has a place and I keep a can of it around but don't use it in any of my airplane engines.
Best,
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Pierre Smith
RV-10, 510 TT
RV6A (Sojourner) 180 HP, Catto 3 Bl (502Hrs), gone...and already missed
Air Tractor AT 502B PT 6-15 Sold
Air Tractor 402 PT-6-20 Sold
EAA Flight Advisor/CFI/Tech Counselor
Louisville, Ga
It's never skill or craftsmanship that completes airplanes, it's the will to do so,
Patrick Kenny, EAA 275132
Dues gladly paid!
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09-23-2011, 07:26 AM
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Join Date: Aug 2005
Location: Dallas/Ft Worth, TX
Posts: 5,668
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The only place I run MMO is in my air tools, keeps them lubricated and it smells good too 
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Walt Aronow, DFW, TX (52F)
EXP Aircraft Services LLC
Specializing in RV Condition Inspections, Maintenance, Avionics Upgrades
Dynamic Prop Balancing, Pitot-Static Altmeter/Transponder Certification
FAA Certified Repair Station, AP/IA/FCC GROL, EAA Technical Counselor
Authorized Garmin G3X Dealer/Installer
RV7A built 2004, 1700+ hrs, New Titan IO-370, Bendix Mags
Website: ExpAircraft.com, Email: walt@expaircraft.com, Cell: 972-746-5154
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09-23-2011, 08:55 AM
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Join Date: Dec 2010
Location: Greeley, Colorado
Posts: 199
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MMO
The previous owner of my engine added a qt at every oil change for 700 hours. I'm not a fan of the stuff but many are. There was a trash truck company around here that bought it in 55 gal drums I've been told and swore by it in every truck they owned. I think it's mystery includes pig fat and perfume. I'm not using it now and I hope the engine doesn't miss it.
__________________
John D. Artz, EAA 71811, 100+ Young Eagle flts
Adopted Dave's 6A
MXL Ultralight, only bleeding after 3 landings
Scorpion Two Helicopter, big mistake
PA-28 and 210E Centurion
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