Graphite all the way...I wouldn't use anything BUT graphite in locks. WD-40 is almost a sure way to gum up a lock if you plan on using it more than say...a day.

__________________
TC
Current stable:
- 2004 Mazda RALLYWANKEL
- 2007 Saturn sky redline
- 2004 Explorer...under surgery.

Past: 135i, GTI, 300E, 300SD, 300SD, Stealth