how do you make after run oil?  
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how do you make after run oil? - 9/30/2002 2:18:40 PM   
99GrandTouring



Posts: 472
Joined: 9/10/2002
From: wilmington, NC, USA
Status: offline 		I was told that you can use Automatic transmission fluid as after run oil?

Should I just use pure ATF??
Also the ATF I have is mobil one SYNTHETIC....
does it matter?
Thanks
       Post #: 1

atf - 9/30/2002 7:45:24 PM   
lurch


 

Posts: 8
Joined: 6/27/2002
From: Island Lake, IL,
Status: offline 		I've also heard about using atf but not too sure about synth. I don't see how it would hurt though.

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       Post #: 2

how do you make after run oil? - 9/30/2002 8:02:31 PM   
quint-rcu



Posts: 657
Joined: 6/10/2002
From: Ocean Springs, MS, USA
Status: offline 		I make a trip to the local car parts store and buy Marvel Mystery Oil. Looks, smells and feels just like commercial after-run. - Hmmm?

quint

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how do you make after run oil? - 9/30/2002 9:40:01 PM   
CaptKAOS



Posts: 231
Joined: 12/30/2001
From: Columbia , MO, USA
Status: offline 		Get the Marvel Mystery Oil for Air Tools......contains a rust inhibitor.....better than the regular Marvel Mystery Oil.....

My 1.675 cents worth.....


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how do you make after run oil? - 9/30/2002 10:04:22 PM   
wingnutII



Posts: 10
Joined: 6/2/2002
From: Oregon
Status: offline 		"Get the Marvel Mystery Oil for Air Tools......contains a rust inhibitor"

More Importantly it has an affinity for water, due to the fact that airtools have alot of condensation if not set up right, ie. no water traps or dryers.

Marvel Mystery Oil for Air Tools, is the best you can get for an after run.

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how do you make after run oil? - 9/30/2002 10:09:41 PM   
hauckf


 

Posts: 187
Joined: 3/1/2002
From: Decatur, AL, USA
Status: offline 		I was taught to use Marvel Mystery Oil for after run oil, and ATF for long term storage of engines. I've been using the regular MMO for years (a quart last forever!) and have never had any rust problems. When its gone, I'll buy the airtool oil. Burning all the fuel out of the engine at the end of the day before adding the after run oil is also very important.

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       Post #: 6

After run oil - 9/30/2002 11:16:51 PM   
DLT


 

Posts: 442
Joined: 12/13/2001
From: Foley, AL, USA
Status: offline 		I mix 1 part air tool oil to 4 parts MMO......seems to work for me.

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how do you make after run oil? - 10/1/2002 5:31:44 AM   
rsieminski



Posts: 1406
Joined: 4/24/2002
From: Sarasota, FL, USA
Status: offline 		How about good old castor, for between sessions?


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WD-40 - 10/2/2002 10:18:22 PM   
bigbadbowtie



Posts: 674
Joined: 8/21/2002
From: Huntsville, AL, USA
Status: offline 		Im not sure on the airplain engines but I have been using wd-40 in my stadium truck for after run oil for quite sometime. Traxxas actually says to use WD-40 in the manual for the new T-maxx.

Works for me.I have 3 gallons through my current
ABC motor and it has great compression still. I have been told not to use it but why change if it works!

Just adding my .02 cents.

Ray

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OS SAID... - 10/2/2002 10:27:38 PM   
redxfred



Posts: 104
Joined: 9/28/2002
From: Strasburg, VA, USA
Status: offline 		A buddy recommended a 50-50 mix of Marvel mystery oil and ATF. Being an untrusting soul, I asked the tech reps at O.S. Engines about this and they said this formula makes an excellent after run oil.

Be sure to use enough! I put 2 cc (4 eyedroppers' worth) in the carb and hold the plane left, right, up and down to slosh it around in there. Spin the prop a few times to coat the bearings but use caution. I'm advised that this stuff may diesel-fire in a warm engine.

Fred

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WD-40 - 10/2/2002 10:39:26 PM   
RedStickFlyer



Posts: 11
Joined: 9/16/2002
From: Prairieville, LA, USA
Status: offline 		Did you know that WD-40 was originally formulated for the military as a rust inhibitor. WD stands for Water Displacer. I would expect it to be an excellent rust inhibitor. I would suggest the best way to put it in is to spray it in the carb and preferably while the engine is turning with the electric starter. I killed the engine with a shot of WD-40 into the carb.

The high vapro pressure of the WD-40 allows it to atomize and coat more evenly than normal oil. The after run oil is only going to protect what it contacts.

By the same token, the high vapor pressure of WD-40 also lets it evaporate. Therefore, I would not use it for winter sorage but as a rust inhibitor between flights it should work well.

The key in after run oil is to get everything coated. A couple of drops in the carb might make you feel good about having used it but you have to put enough in to coat the bearings. Keep in mind on most model engines the crank shaft of over hung meaning that both the bearings are on the propeller side of the piston so after you get the oil in the crank case you need to get it up to the front of the plane.

I suspect most people get little bennifit from after run oil because they only get it on the aluminum parts that already are not going to corrode.

I have not done any studies or testing to prove this. Its just my opinion as a chemical engineer who runs a petro chem plant.

I hope this helps

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how do you make after run oil? - 10/4/2002 4:17:35 AM   
Dave Harmon


 

Posts: 108
Joined: 7/23/2002
From: Sperry, OK, USA
Status: offline 		Redstick....You are right...it works great on my sport engines. What I do is to stick the red plastic tube into the carb ad open the throttle 2 or 3 clicks, give it a couple of good shots and start the engine (with the fuel line off) Then, I keep the engine running on the WD by giving more shots as the propellant is burned. This will distribute the WD and it really does help a lot and the engine is real loose next time out. I used to mix a 50/50 mix of castor and alky as an after run and then run the engine on that. That will completely stop all corrosion and rust but it can get a little messy. Oh..the castor/alky mix was in a small external fuel tank so you don't have to put any in the airplane tank.
If your engine has any silicone rubber internal parts, dont use WD40 or any petroleum product because the silicone will swell.

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how do you make after run oil? - 10/14/2002 8:52:06 PM   
GMPheli


 

Posts: 144
Joined: 12/31/2001
From: West Bridgewater, MA, USA
Status: offline 		The problem you can run into using WD-40 is that it is designed to loosen rust. If you have any rust inside the engine and the WD-40 breaks it free, the rust (iron oxide) makes a wonderful abrasive. This is per Clarence Lee.

Alan Angus

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how do you make after run oil? - 10/25/2002 6:50:50 PM   
bdtsr


 

Posts: 1447
Joined: 9/3/2002
From: Egg Harbor Twp., NJ, USA
Status: offline 		Go to a marine supply store (or auto parts) and get the CRC Engine Fogging Oil or similar. This is designed for long term storage of engines (both aluminium and iron blocks). It is cheap, lasts along time (large can) and will prevent rust. I live very near the water on the east coast and take every precaution to keep moisture out of my engines. I have been using this since I started flying (6yrs ago) and only have replaced bearing in engines I bought from other people. I spray this into the carb and the cylinder and work it around. When the engine is fired up this oil will burn right out.

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how do you make after run oil? - 11/8/2002 6:39:36 PM   
Graxafone



Posts: 110
Joined: 9/24/2002
From: Farmington Hills, MI, USA
Status: offline 		What do you think of Hobbico's After Run Oil? And just to let you know, the 40 in WD-40 means that it is the 40th attempt at a good formula of oil and chemicals.

< Message edited by Graxafone -- Nov 9 2002 9:50PM >

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