So I changed the oil in my 00 7.3l the other day, I used Mobil delvac 15w40. Started, checked for leaks and then checked level. Everything all good. Got under the truck yesterday to investigate replacing the up pipes and noticed the paint on the filter is blistered and cracking off the bottom of the filter. Oil pressure and engine temp were both normal when driving. Has anyone else seen this before? Bad paint job, or is the oil getting way too hot for some reason. Thanks!!