Originally Posted by woozy

An almost immediate solution is to neuter, had this issue with Angel before. No more oily tail ever since but I remember the vet telling me to do a super quick wash with dish washing liquid if I wanted to get the oil off. But of course to be sure whether it is a situation influenced by the male sex hormone testosterone or something else, go have your vet check it out. You wouldn't want to apply the wrong oil elimination treatment for the wrong reasons.
wooz....