A buddy of mine has oil making it to the first stage of the air box, not the filter. I read where there may need to be a syphon break installed. What I cant find is if the fuel injected Rhinos need one. The machine has 1800 miles, and still runs great. No smoking either. Is there a vent line on the 09s that could be stopped up? This is the first time for this problem, on his rhino. Thoughts?