It's not the main piston, but the slide pins that allow the pads to release from the rotor. The local parts store sold me some white lithium grease and says he does that to fix the cars in his shop. I purchased it anyway since I've been needing it for my bike applications, but was wondering if I should use red valvoline wheel bearing grease or black synthetic lithium grease instead of the white?
Or is the white good enough for the application.
Thanks