Well, you got the link provided by T-bird, now on the other hand, why not pay attention to experience ? I 've been servicing my reels for almost 30 years, in theory grease should be used on gears, right ? well, I thought that if grease should be used on ALL gears the levelwind gear should be greased, I did that, some months later I had to replace the pawl of my only BC reel beacuse it grinded so bad that it was no longer working, the dust & dirt bind and get trapped to the grease turning it into a very abrassive paste capable of grinding down the pawl teeth in a matter of months with use. After that experience I discarded the use of grease on the levelwind worm gear and used heavy oil. Problem solved, after changing the pawl that reel has seen more than two decades of use without further part replacement.