Oil lights going away too quickly...

[Super Phil]

I had the oil changed and computer reset on my 1996 318ti, and now maybe 2,000 miles later all the green oil lights have already clicked off on the dash. I haven't driven the car hard or anything. I used Valvoline full synthetic (in case anyone was wondering). Any idea why the lights clicked off so fast??? I tried to do a search, but that function doesn't seem to work on my phone.