I know they provide the cheap oil changes so they can make money on the sale of additional service. But to recommend I replace my air filter at 15K miles is way, way out of line. Talk about loss of creditability (not that they had any to begin with). I explained to them that the filter minder was used to determine the need to replace the air filter and that in most trucks the OEM filter would last around 70K miles before it needed to be replaced. I guess I need to start dressing better and shaving before I take my truck in next time, so they won't think I'm a MORAN!!!