i have a kubota L3240 tractor, the other day i changed the oil for the second time since owning it. the machine has 191 hours. All was good til i ran it the other day for bout an hour. went out the next day to check oil, and noticed dip stick not seated and oil around that area. checked level and it was around 2 1/2 quarts low. cranked tractor and oil blowing out tube. there has been no smoke or problem before changing oil. the only thing i did different is pour the oil in at the lower fill point instead of on top at the valve cover. Hard to believe i have a ring problem as it is not smoking nor has given me any sign of oil loss til i changed it. like i say only ran it about an hour and the machine has never over heated. Any ideas?