Last night i was driving and noticed the boost gauge not working as I remembered it the day before. I generally get up to speed pretty hard, usually about 10 psi on the gauge, but last night the gauge was hardly moving past 4 or 5. I decide to really try to make the gauge move and when i mashed on the go pedal it seemed to come up around 5psi and almost stop and then jump up to around 15 or so. i checked in the dark for a pinched hose, will check it again this afternoon though. If its not the hose and the gauge is just sticking would it hurt to shoot a lil oil in it? Or is that a sign of a boost leak somewhere? Also when its up in higher boost and I let off the throttle in drops instantly to around 4 or 5 and then slowly back to 0 psi.