The easiest way to stop it from leaking is to put less in it.
Where is it leaking from? If you can't tell get some simple green and go to town on the engine, once it is factory spotless take it for a drive and look for oil. Mine mainly leaks into the air box, the little bit that leaks out of the oil cap dries on the valve cover before it can run down and drip, so at least it is self contained and does not leave spots.
Are you 100% it is leaking from the motor? The manual transmission takes engine oil, the transfer case takes automatic transmission fluid, and both axles take gear oil.
˙ɹǝʌo ɹǝʇndɯoɔ ɹnoʎ dılɟ sıɥʇ pɐǝɹ uɐɔ noʎ ɟı