Some oil is to be expected from all that valve action slapping oil off the rockers. Too much is a sign of blow-by. You might try some zMax additive to tighten up your cylinders and rings. It works in about three to four weeks, it's relatively cheap, and only needs to be added about every six months.
The wise eagle keeps his talons hidden!
Visit my 2000TJ "Hewgag"
in BackCountry Trailers' Back Country Rigs
section at http://www.backcountrytrailers.com/