I've got a 753 Bobcat which has been just about bullet-proof since I got it. Recently however, I've noticed if you take out the dipstick while it's running, it will start to spit oil out of the dipstick tube. It's got the Kubota diesel engine in it and it's never had any blow-by and always ran great. Any idea what it could be? I'm hoping to replace the whole machine in the spring, but it looks like for now it's gonna be another busy winter with it doing snow removal.