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After Run or Not
07-26-2007 | 11:51 PM
#3
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RE: After Run or Not
of course it's a good idea to use it,most engine mfg. recomend some sort of oil for corosion resistance.
I don't all the time after every flying day,most of the time I just run the engine dry and call it a day,most of the guys at my club don't either.
I don't all the time after every flying day,most of the time I just run the engine dry and call it a day,most of the guys at my club don't either.
07-26-2007 | 11:55 PM
#4
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From: Meridian, ID
RE: After Run or Not
It certainly can't hurt.
But with that said, I have never used after-run oil. I've also never had bearings go bad on me. Lucky I guess.
I pull the fuel line and completely run out the engine before I pack it in for the day. My oldest running engine is a YS 1.20 purchased in 1992. I run 20/20 synthetic fuel in everything, including my two-strokes.
But with that said, I have never used after-run oil. I've also never had bearings go bad on me. Lucky I guess.
I pull the fuel line and completely run out the engine before I pack it in for the day. My oldest running engine is a YS 1.20 purchased in 1992. I run 20/20 synthetic fuel in everything, including my two-strokes.
07-27-2007 | 03:54 AM
#5
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From: Sailing in the Eastern Caribbean
RE: After Run or Not
The more nitro you run the more the need for afterrun oil IMHO.
I am not sure what is the best after run oil. I just use 3in1 a light mineral oil but an engine guru says that there are better ones around. I ALWAYS OIL 4ST engines if I expect not to use them for more than a week.
I am not sure what is the best after run oil. I just use 3in1 a light mineral oil but an engine guru says that there are better ones around. I ALWAYS OIL 4ST engines if I expect not to use them for more than a week.
07-27-2007 | 05:42 AM
#6
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From: Jacksonville, FL
RE: After Run or Not
I dont know if it does any good or not. I use it and I burn the excess fuel out of the engine too. I don't think i've had a bearing failure on an aircraft engine, but some bearings have been rusty. even stored the aircraft tail up to get oil to the front bearing
Now I'm using marvel mystery oil as after run, jury is still out on this
Now I'm using marvel mystery oil as after run, jury is still out on this
07-27-2007 | 05:46 AM
#7
RE: After Run or Not
For me it depends.
If I plan on flying soon then I do not. If the engine is going to be in storage for months (during winter for example) then I do.
Also, some fuels say not to use after run oil.
If I plan on flying soon then I do not. If the engine is going to be in storage for months (during winter for example) then I do.
Also, some fuels say not to use after run oil.
07-27-2007 | 06:45 AM
#8
RCU Forum Manager/Admin
My Feedback: (9)
RE: After Run or Not
One thing to think about when considering using after run oil is too look at the blend of fuel you use. Some manufacturer (i.e. Morgan Fuels) add after run oil to the thier fuel blend. I use Cool Power which has the after run oil added to the mix.
Ken
Ken
07-27-2007 | 07:19 AM
#9
Senior Member
My Feedback: (14)
RE: After Run or Not
I don't use it after every flight, but I'll use it at the end of the season, or when storing an engine. I have had problems with bearings and rings rusting up. I had to rebuild two OS 1.60 FXs after the ring locked up (no compression whatsoever) and a .91 FX. You better bet my ringed engines get extra oil now.
07-27-2007 | 10:29 AM
#11
My Feedback: (11)
RE: After Run or Not
Never used it, never will. I use it if I am going to store an engine, but burning out the extra fuel and then adding oil makes no sense. The nitro evaporates from the fuel before you get it put in the car and all that is left is oil. That does the job just fine. My friends that burn out the fuel end up changing bearings, I don't. I figure, if it works, don't change it.
07-27-2007 | 12:28 PM
#12
RE: After Run or Not
ORIGINAL: FLYBOY
Never used it, never will. I use it if I am going to store an engine, but burning out the extra fuel and then adding oil makes no sense. The nitro evaporates from the fuel before you get it put in the car and all that is left is oil. That does the job just fine. My friends that burn out the fuel end up changing bearings, I don't. I figure, if it works, don't change it.
Never used it, never will. I use it if I am going to store an engine, but burning out the extra fuel and then adding oil makes no sense. The nitro evaporates from the fuel before you get it put in the car and all that is left is oil. That does the job just fine. My friends that burn out the fuel end up changing bearings, I don't. I figure, if it works, don't change it.
Fuel with castor oil tends to coat and protect engine components better than fuel with only synthetic lubricants. Your friends who burn off all of their fuel but later end up changing bearings are probably running 100% synthetic lubrication fuel and then failing to use after run oil.
If you run fuel without castor oil, you will want to use a fuel blend that contains after run oil components or to use after run oil periodically to protect your engine bearings. If you run fuel with castor oil, you don't need to use after run oil between flights all that frequently, but the after run oil should be used when storing your engines to help prevent the castor oil from drying out in storage and "gumming up" your engines.
There is no harm that can come from using after run oil. Not using it, however, can lead to rusty bearings or engines gummed up from being stored too long.
07-27-2007 | 01:17 PM
#13
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From: Lacona,
NY
RE: After Run or Not
ORIGINAL: bigedmustafa
Actually, when the fuel evaporates, it causes the metal of the engine to cool, which will then draw moisture out of the air like "sweat" to a beer bottle. The after run oil is supposed to coat and protect the engine components, bearings in particular, from the moisture collected from fuel evaporation.
Fuel with castor oil tends to coat and protect engine components better than fuel with only synthetic lubricants. Your friends who burn off all of their fuel but later end up changing bearings are probably running 100% synthetic lubrication fuel and then failing to use after run oil.
If you run fuel without castor oil, you will want to use a fuel blend that contains after run oil components or to use after run oil periodically to protect your engine bearings. If you run fuel with castor oil, you don't need to use after run oil between flights all that frequently, but the after run oil should be used when storing your engines to help prevent the castor oil from drying out in storage and "gumming up" your engines.
There is no harm that can come from using after run oil. Not using it, however, can lead to rusty bearings or engines gummed up from being stored too long.
ORIGINAL: FLYBOY
Never used it, never will. I use it if I am going to store an engine, but burning out the extra fuel and then adding oil makes no sense. The nitro evaporates from the fuel before you get it put in the car and all that is left is oil. That does the job just fine. My friends that burn out the fuel end up changing bearings, I don't. I figure, if it works, don't change it.
Never used it, never will. I use it if I am going to store an engine, but burning out the extra fuel and then adding oil makes no sense. The nitro evaporates from the fuel before you get it put in the car and all that is left is oil. That does the job just fine. My friends that burn out the fuel end up changing bearings, I don't. I figure, if it works, don't change it.
Fuel with castor oil tends to coat and protect engine components better than fuel with only synthetic lubricants. Your friends who burn off all of their fuel but later end up changing bearings are probably running 100% synthetic lubrication fuel and then failing to use after run oil.
If you run fuel without castor oil, you will want to use a fuel blend that contains after run oil components or to use after run oil periodically to protect your engine bearings. If you run fuel with castor oil, you don't need to use after run oil between flights all that frequently, but the after run oil should be used when storing your engines to help prevent the castor oil from drying out in storage and "gumming up" your engines.
There is no harm that can come from using after run oil. Not using it, however, can lead to rusty bearings or engines gummed up from being stored too long.
Very true! Also, my engines start up quicker... forgot to mention that before.
Luftwaffe Oberst
Radio Aero Modelers Club
AMA District II
Pulaski, NY
07-27-2007 | 06:36 PM
#14
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From: Thousand Oaks,
CA
RE: After Run or Not
Use after run or any oil for that matter, as the methanol in the fuel evaporates it atracts moisture from the atmosphere. As anyone who has watched Ice Road Truckers (on the history channel) the truckers use Methanol evaporators to draw moisture from the air lines so they will not be obstructed by ice. DO AFTER RUN, my friend who has a nitro car uses after run and his engine has been just fine.
07-27-2007 | 09:14 PM
#15
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From: Austin,
TX
RE: After Run or Not
I think that getting the methanol out of the engine is most important. It is extremely hygroscopic, meaning that it draws humidity out of the air and that water stays behind when the methanol evaporates. Rusting was seldom a problem back in the days when control line flying dominated. These planes had no throttle and flew until the tank went dry. This ensured that the methanol in the crankcase was consumed. Also, with open exhausts, the engine was very open allowing any remaining fuel to to dry up.
Full scale race cars that burn methanol as a fuel are often run on gasoline for a minute or two to clear all traces of methanol out of the engine before being put away.
Full scale race cars that burn methanol as a fuel are often run on gasoline for a minute or two to clear all traces of methanol out of the engine before being put away.
07-28-2007 | 01:53 AM
#16
RE: After Run or Not
ORIGINAL: B.L.E.
I think that getting the methanol out of the engine is most important. It is extremely hygroscopic, meaning that it draws humidity out of the air and that water stays behind when the methanol evaporates. Rusting was seldom a problem back in the days when control line flying dominated. These planes had no throttle and flew until the tank went dry. This ensured that the methanol in the crankcase was consumed. Also, with open exhausts, the engine was very open allowing any remaining fuel to to dry up.
Full scale race cars that burn methanol as a fuel are often run on gasoline for a minute or two to clear all traces of methanol out of the engine before being put away.
I think that getting the methanol out of the engine is most important. It is extremely hygroscopic, meaning that it draws humidity out of the air and that water stays behind when the methanol evaporates. Rusting was seldom a problem back in the days when control line flying dominated. These planes had no throttle and flew until the tank went dry. This ensured that the methanol in the crankcase was consumed. Also, with open exhausts, the engine was very open allowing any remaining fuel to to dry up.
Full scale race cars that burn methanol as a fuel are often run on gasoline for a minute or two to clear all traces of methanol out of the engine before being put away.
07-28-2007 | 11:17 AM
#18
My Feedback: (11)
RE: After Run or Not
Didn't think about humidity, we don't have it. If I were in Mn where I used to live, I would use the tool oil or marvel as everyone else does. It is kind of based a lot of geographics. I still wouldn't burn the fuel out every time. Just my 2 cents.
07-28-2007 | 04:02 PM
#19
Senior Member
RE: After Run or Not
i always put 5 drops of ARO in the carb and 5 in the glow plug hole, i sometimes only go flying once a fortnight so i put a bit of ARO in there to keep everything lubricated (i run 10% nitro, so its best to be on the safe side and give it a little bit of corrosion prottection) but i dont put ARO in it if im planning to go flying again within the week)
