Yellowhawk, just a few drops are all that is necessary. Open the throttle, I usually put from 5 to 10 drops in there, and that probably is more than necessary. You can use Mobile 1 synthetic, by the way, (recommended by our club pro and many others) which is an excellent after-run oil. When you are done, leave the throttle open and hit the motor with your electric starter (if you use that) or flip the prop several times with your chicken stick to turn the motor several revs. Then close the throttle.. yer done. That will circulate the oil in and through the engine and give a good coating of protection.

Hey, no matter what the manufacturers of the fuel say about 'no need for after run with their additives', what's the harm in adding a little additional protection like a few drops of after-run never hurt anything, and doesn't cost a lot.

DS.