http://traxxas.com/support/How-Perfo...-run-Procedure
I never really like to argue a point but WD40 is a good short term after run oil.It will not harm your engine andwill clean your engine of deposits in the head and lower end. I have also usedin short term for many years and my most of my engines are over 8 years old and still running without any problems. I would never suggestsomething if I have not already done it and proven it works
For long term storage I use Marvel Mystery Oil because the WD40 will evaporate over a long period of time and become thicker but will not harm the engine.
Proper care also includes dropping your piston to the bottom of the compression stroke. R/C engines do not use piston rings and they use something called a pinch type compression. So dropping the piston out of the compression stroke while sitting will help your engine last longer. Why because over time leaving the piston at the top of the stroke will over time stretch the piston walls over long periods of storage. My engines sitfor winter storage about 6 months out of the year because I do not run them in the winter time.
This is straight from Traxxas a R/C manufacture which I have 4 of these engines in my collection along with a fewO.S Engines andother engine manufactures.
After-run Procedure</p>
You must perform after-run maintenance on your Traxxas engine whenever the model will be stored for longer than a few hours. Taking the time to prepare your engine for storage will reward you with longer engine life, easier starting, and better performance.
When a nitro engine is shut off, some excess unburned fuel remains in the engine. The methanol in model engine fuel is hygroscopic, which means it easily attracts and absorbs moisture. This moisture can cause rust and corrosion on the steel engine parts (crankshaft, bearings, wrist pin and starter shaft) if the fuel is not removed from the engine. There are after run oil products available from your hobby dealer or you can use WD-40, a common household lubricant. To ensure your TRX 2.5R Racing Engine is protected from internal corrosion, use the following procedure:</p>
1. Whenever possible, shut off the engine by pinching the fuel line closed. This allows most of the excess fuel to be consumed by the engine. Be sure the throttle is in the idle position. You may have to pinch the fuel line closed for several seconds before the engine stops.</p>
2. Completely empty the fuel tank. Use your fuel-dispensing bottle to suck out the old fuel. Do not mix the old fuel with your fresh fuel supply. If you leave fuel in the tank, transporting or handling your Revo may cause fuel to run into the engine.</p>
3. With the fuel tank empty and the throttle at the idle position, try to start the engine. The engine will most likely start and run for a few seconds as it uses up any fuel remaining in the engine and fuel lines.</p>
4. Once the engine stops, clean the outside of the engine with compressed air or spray motor cleaner. Once the engine is clean and dry, remove the glow plug power wire, glow plug, and air filter.</p>
5. Open the throttle fully and spray a one-second burst of WD-40 into the carburetor and into the glow plug hole (Caution! Wear safety glasses to prevent spray from getting into your eyes). If you are using after-run oil, follow the manufacturer's instructions.</p>
6. Place a rag or paper towel over the engine to catch any WD-40 or after-run oil that may come out the carburetor or glow plug hole.</p>
7. Connect the EZ-Start® controller to the model and spin the engine for 10 seconds.</p>
8. Remove the rag or paper towel and repeat steps 5-7 two more times.</p>
9. Clean and re-oil the air filter so it will be ready for use next time.</p>
10. Replace the glow plug, reconnect the glow plug power wire, and reinstall the air filter.
While I do not follow these instructions all the way I put enough oil down the carb then turn over the engine a few times to pull the after run oil upthru the engine. I have never removed my glow plugs in the after run process and asI said above most of my engines are over 8 years old and still running
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