hi, i just got a 2001 xlt supercab the other day. its a V6 4.0L. it has 135,000 miles on it. yesterday i changed the oil. i put in 5 quarts of mobil 1 fully synthetic 5W-30, and used a motorcraft 820S filter. today, i go to start it up, and the check gauges light comes on and the pressure...