Yeah definately not, your gear oil is in your clutch case which is seperate from the crank cases. The only way it would get into your crankcase or drip from your exhaust is if your right side crank seal was leaking. But you would definately know if that happened due to the excessive white smoke that would constantly be coming out of your silencer. Too much oil in your premix could cause oil to drip from your exhaust tho. I use to have that problem, SWITCH BACK TO 40-1 WITH ME HAHA !