My change oil light comes on about every 400 miles at least. Dealer tells me nothing is wrong and to change my oil. Last week I changed my oil for the fourth time with 8500 miles on my rig and the light came on this week after driving about 100 miles. Something is obviously wrong. Anybody have the same problem and find a fix? I just keep resetting it but, I would love to rely on it if it worked. Thank-you.