For engines cowled I get the oil where its needed with a medium size medical syringe with a piece of fuel tubing attached then a short piece of hard plastic tube instered into the end of the fuel tubing. What hard tube does is allows me to do is connect it to the breather line of my four strokes and inject oil right into the crankcase. Note the 'plunger' of the syringe will not hold up to oil, however replacing it with an O-ring with make it work forever.

The debate of whether after run oil is necessary will always rage on. I say do what you think is best and have fun flying.