I'm using bearing grease I picked up at an auto shop. It is my first time using it. I packed my reel full. I did 2 so far got 5 more to go. I tested it by leaving it out in 20 deg for 15 min. and then test reeling it was noticeably harder to reel. At Room temp it's perfect it’s as stiff as new a VS.

I had used Vaseline with 3 in 1 oil. It works, but melts in over 100 deg. Temps and makes a mess since I never take my rods out of the car during the season. I learned about the Vaseline from an old timer. I will go back to it in Mid Sept. when car temps are cooler. The insides of my heavily used reels are like bran new a Penn 4500s used for 7 years.

I know a lot of people use Marine grease and are really happy with it. I imagine it's the same as bearing grease. They both have anti corrosion properties.