I have a Deutz Allis tractor with, I believe, 3L912 motor, that starts and runs great but smokes when you floor it and is dripping oil or oil/diesel out the crankcase breather and is oily around the rear exhaust manifold port. Thoughts on if its a slobbering injector or cracked oil ring? I have not run it enough to measure crankcase fluid increase or decrease. Thoughts? Thanks.