How much is enough?  I'm sure I'm using too much, makes engines very hard to start.  I'm talking 19 to 45 size if it makes much difference.  Thanks for the advice.   

How much is enough?  I'm sure I'm using too much, makes engines very hard to start.  I'm talking 19 to 45 size if it makes much difference.  Thanks for the advice.   

I use several drops (??) down the venturi.  Almost like a prime, when I'm not going to be using the engine for a long time.  During the flying season I don't hardly use it.  I use Aero 1 oil in my fuel, about 1 oz. per gallon (??) and the engines stay very clean through out a season internally.  Of course, I don't use any "all synthetic oil fuel" if that makes a difference, only 1/2 Castor, 1/2 synth. or all castor. (??)

My "storage oil is a (roughly) 1/2 and 1/2 mix of air tool oil and Riselone.  No ball bearing problems after up to 10 years of using this to store engines.

Hey, Jim!  I got the "warning" that you had posted while I was typing,  We say basically the EXACT same things!  so I'm not gonna change! LOL!!