Just make sure it's not petroleum based. That could end badly in a failed Tippmann C3 experiment.
Alright, other than oil... if you haven't watched the old Tom Kaye videos on the Automag, you need to do so. The basics of troubleshooting the valve still hold true to this day. Just go to YouTube and search for it... I think there are 9 parts to it.
Then, we can get into the weeds as far as you want to go!