speedplay zero question
 

how often do you lubricate your speedplay's?

whats a good "grease injector" to use?

Every 2,000-3,000 miles or so. I just go by feel really (you will be able to clearly tell when they spin more freely).

I use a generic grease gun with Teflon grease.

http://i42.tinypic.com/33jkfa0.jpg

As long as it has a needle tip that fits into the port, it is fine. No need to spend a ridiculous amount on the SP grease gun. Just follow the directions from SP (like injecting grease while rotating the pedals) and all should be good.

cleats, every ride
pedal, 2-3 times a year...ymmv