I when out today when I left oil was full,when I got back it was on the low end of the dipstick .
I am certain it whent out the valve breather (pipe goes over the frame then back to the ground)
anyone know why it’s happening?

 

Check oil level again now it has stood, sometimes takes a while for oil to all drain back down. If it is using oil oil, check compression, as using oil is a symptom of worn piston rings and/or cylinder