Drove it today for the first time since Friday. Only 5F and she let out a pretty good chirp as she fired up. Guess some belt slippage. Completely quiet otherwise. Guess it's time for the oil pressure sender to be changed. This morning all was good (5F), sat all day in the parking garage at work and oil light on all the way home (about 20F). No funny noises and oil level fine. Did this off and on last winter too without any pattern. Did it a couple weeks ago when leaving in the AM and light shut off after a restart. Anyone else get this?