I noticed earlier when I was leaving for work the oil pressure gauge only climbed just under a quarter, then when I started acceleratin it stayed there....So I pulled in the gas station shut it off, waited a couple minutes then when I started it back up it climbed normal to around half then was moving normal after that. Can those gauges stick, or could it be the sending unit, Or does the Sending unit just send signal to the low oil light? Anyone have any ideas?