My father-in-law forgot several turnips in his trunk. We went on a 1600 mile trip with him and our 6 month old daughter in diapers. The whole time we thought it was our daughter's diapers that smelled so bad. When he got home and our daughter wasn't around it smelled even worse. That year old car was never the same again.Is gear oil worse smelling then the gallon of milk my mother left in the trunk of her brand new Camry for a few weeks?