I recently purchased a 2004 F-350 crew cab short box. The truck was a single owner truck and I just purchased a ScanGauge 2 and my delta on the highway after 20 miles was only 2 degrees, do you guys think that he replaced the oil cooler? I’m not complaining about the oil cooler only having a 2 degree delta but I’m just curious if you guys think it had work done to it?