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After run oil - 7/18/2008 6:30:00 PM   
Roo Man


 

Posts: 55
Joined: 3/4/2008
From: , TN, USA
Status: offline 		I have been using after run oil but am getting low. Hy LHS no longer sells the type you put in after shut down, the are selling the kind that mixes with the fuel and at a premium price. I have heard that automatic transmission fluid can be used, anyone have any experience with it?

Gary

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Roo Man
WTRCF Jackson, TN
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RE: After run oil - 7/18/2008 6:37:40 PM   
Jburry



Posts: 558
Joined: 7/12/2006
From: Cape Spencer, NB, CANADA
Status: offline 		The best thing to use is air tool oil. Marvel Mystery Air Tool Oil is very popular for this. Some mix with ATF. I just use a generic brand air tool oil, and I use it only when the plane is going away a few months (read winter).

J

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RE: After run oil - 7/18/2008 6:51:03 PM   
YUKONFLYR



Posts: 248
Joined: 4/18/2007
From: WHITEHORSE, YT, CANADA
Status: offline 		I agree -

Marvel Air Tool oil and ATF, I use air tool oil and ATF at a 50/50 mix and I use lots of it, usually about three applications and spin ups after just to make sure that all of the combustion by products of burning methanol & nitromethane are out of there. Like Nitric acid which is very corrosive.

Richard

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RE: After run oil - 7/18/2008 6:51:31 PM   
RCKen



Posts: 14395
Joined: 7/10/2002
From: Lawton, OK, USA
Status: online 		You can also use automatic transmission fluid as well. Some fuel manufacturers blend an afterrun oil in to their fuel, so you might want check that out. I use Cool Power from Morgan fuels and they add it to all of their fuel blends.

Ken

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RE: After run oil - 7/18/2008 6:55:00 PM   
MinnFlyer



Posts: 19353
Joined: 4/22/2002
From: Willmar, MN, USA
Status: offline 		Personally, I never bother with the stuff.

I recently resurrected an OS 46FX that I bought in the 80's. In the last 20 years this engine has gotten used sporadically but spent most of its time sitting on a shelf, or in an airplane that was not being flown.

It also spent time in two seaplanes where it got dunked more than once.

I just pulled it off the shelf to put in another seaplane which was test-flown this week and it still screams like the day it was broken in.

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RE: After run oil - 7/18/2008 7:26:19 PM   
Roo Man


 

Posts: 55
Joined: 3/4/2008
From: , TN, USA
Status: offline 		Thanks for the input. Looks like Marvel oil and At fluid.

Gary

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Roo Man
WTRCF Jackson, TN

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RE: After run oil - 7/18/2008 7:34:13 PM   
Adui


 

Posts: 487
Joined: 8/24/2007
From: Dayton, OR, USA
Status: offline
quote:

ORIGINAL: Roo Man

Thanks for the input. Looks like Marvel oil and At fluid.

Gary

Make sure its Marvel Air tool Oil.. I am told regular Marvel Mystery oil is good, but can still let moisture in. (Could be wrong but thats what i was told, here)

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RE: After run oil - 7/18/2008 7:36:51 PM   
Gray Beard


 

Posts: 1746
Joined: 4/21/2003
From: Hemderson, NV, USA
Status: offline 		I never bother with the stuff unless the engine is going into long storage or I'm doing A rebuild.
Never ever use it in A YS engine!!

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RE: After run oil - 7/19/2008 4:58:32 AM   
Charlie P.



Posts: 2230
Joined: 2/25/2003
From: High Above Upstate, NY, USA
Status: offline 		I use Dextron III tranny fluid as my after-run oil . . . and that shows how long a bottle will last - they're up to Dextron IV or better now. I always drive standards so it's all I need it for. ;-D

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"Gravity is weak but it is persistant" AMA 747089/IMAA 30723

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RE: After run oil - 7/19/2008 5:03:49 AM   
jessiej



Posts: 1803
Joined: 7/6/2003
From: STATESBORO, GA, USA
Status: offline 		Automatic transmission fluid works like a charm. Put in about a teaspoon and turn the engine over several times. Then if life unexpectedly gets in the way of your flying the engine will still be good to go for weeks or years.

jess

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RE: After run oil - 7/19/2008 5:18:20 AM   
Cashpoboy


 

Posts: 58
Joined: 8/8/2005
From: Bedford, TX, USA
Status: offline 		I'm with Minnflyer on this. I never use it. I have pulled engines out of boxes that were sitting for decades that fired right up with great compression and not a hitch.

Besides, when and if you ever run an engine to the point of destruction.....Hey now you got a reason to go get a new one.

Life is too short to worry about such things.

I'm sure I will catch some heat on this but remember they are just toys. No way, did I really just say that.

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RE: After run oil - 7/19/2008 5:31:22 AM   
RCKen



Posts: 14395
Joined: 7/10/2002
From: Lawton, OK, USA
Status: online 		While I posted an alternative I am with Minn and Cashpoboy as well. I don't use it in any engine. I do use Morgan fuel that has it blended in, but other than that I don't worry about it. I've had engines on the shelf for 5+ years and opened them up and have had zero rust in them.

Ken

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       Post #: 12

RE: After run oil - 7/19/2008 6:02:49 AM   
Stick 40


 

Posts: 221
Joined: 6/7/2003
From: quincy, MI, USA
Status: offline 		OK, I made the popcorn I'm in the recliner lets start.

First marvel is a great oil, for after run oil. I used it ( in michigan) 20 years ago and put my motors away with out too much attention and now I am getting them out and they are good to go.

a quart of marvel costs about $5 and it takes about four drops at the end of a flying day. Do the math that quart will last as long as you plan to fly your planes ( put it in the will and leave the rest it to the next of kin). If your in a dry area I guess you don't need it, does it hurt anyting ,don't think so, could it help- might. What does a motor cost????

Dry areas have dirt, could the oil help in a dry dirty area, don't know - don't care ( michigan remember ). It all comes down to what do you want to do!!!!!!!!

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RE: After run oil - 7/19/2008 4:48:26 PM   
Jim Thomerson



Posts: 2787
Joined: 10/9/2002
From: Austin, TX, USA
Status: offline 		My experience with Marvel Mystry Oil over long term is that it formed a hard red crud in the engine. I suspect this may have been in combination with castor varnish, but I am not sure. In any case I have never had any problem with Rislone.

(in reply to Stick 40)
       Post #: 14

RE: After run oil - 7/19/2008 8:30:44 PM   
jessiej



Posts: 1803
Joined: 7/6/2003
From: STATESBORO, GA, USA
Status: offline
quote:

ORIGINAL: Cashpoboy

I'm with Minnflyer on this. I never use it. I have pulled engines out of boxes that were sitting for decades that fired right up with great compression and not a hitch.



I too have run engines that have sat for decades, in a very damp pasement no less, that fired and ran like new. They were lefe due to college, war, marriage, career, kids, all those things that crop up unexpectedly. The engines survived, I am quite sure due to having been run on fuel with castor lube. Despite that experience I now use after run oils.

If one is a gambler, or not particularly concerned about the longevity of an engine I would recommend using it and forgetting it. It is after all a replaceable item. Especially if one subscribes to the throw away societyohilosophy. OTOH for a couple of pennies worth of oil and a few seconds of time the protection of the engine can be assured for years. It is an individual choice, and I am amazed at the thousands of words expended on the subject on the various fora over the years. Like the castor/syn debate it will never reach unanimity of opinion in the lifetime of those posting now.

jess


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       Post #: 15

RE: After run oil - 7/19/2008 8:49:07 PM   
Jim Thomerson



Posts: 2787
Joined: 10/9/2002
From: Austin, TX, USA
Status: offline 		A counter story. My son had a timer failure and lost His Fox 25 powered free flight at the 1980 Dayton Nats. It landed in a tree and spent the winter there until it blew down the next spring and the people who found it contacted me. The engine had no rust or