i have had my truck almost 2 years and its got about 15k miles on it. took it out for a driver last weekend everything sounds and runs great but out of the corner of my eye the oil temp guage needle jumped from 0 ot 160. thinking i was seeing something, my truck coolant temp is now running at normal temp but the oil temp guage is still low. i give the oil temp guage a good tap tap on the face and bam it jumped to the 200 mark. dang i have a sticky guage. time to get it replaced.