Be very careful what oil or lubrication you put into your ignition cylinder. (As as old GM service manager) We had a issue with ignition lock cylinders binding. Customers first repair was to spray WD40 or something to that affect into the ignition.
This washed the thicker grease away in the tumblers and caused them to bind.
I know GM had a service bulletin with a part number for the grease. I'll do more research and post it.
Just wanted to throw this out before everyone starts lubing there Rocket tonight