Driving home from work today about three miles and just before I pull into my driveway my oil preasure light came on and it looked like the preasure at idle was a little low. I pulled into the driveway and thats when it came on again. Can it be that I may need to add a quart or so of oil? I did notice a couple of times while driving that the car kind of hesitated or at least it fealt like it. Can anyone evaluate? Thanks in advance for your help.