Trace amounts of white smoke out the exhaust

I use pure gas cause I feel it runs a bit smoother. Not only does it attract moister but it also contains a natural water content, thats why bacteria can start to grow in it when it sits for a while. chemistry minor coming to use! haha I haven't seen any oil on my air cleaner but I know for a fact my crankcase isn't air tight. Still have the original (now rock hard) rubber seals in the valve covers for the Pcv and breather.