I have a 98 caravan w/ 90,000 miles. The Oil light and bell goes on after running it for a few miles. What could this be? Oil is changed and full. Driving my wife nuts.

your vehicle very likely has two oil related sensors. one sensor is for the oil pressure gauge.. If you have this gauge you should be able to see it working. The other is the low level oil warning sensor... I am exactly sure where it is located, but you might try to replace it next time you change the oil.

hope this helps.

having the same problem on my 98 caravan, could it be the oil pump?