I'm not sure why cause i know it causes leaking but i switched to synthetic...i just bought the truck and It ran great...so i changed the oil and went with Mobil 1 and it started seaping out...either the rear main seal...or the oil cooler adapter gasket...should i just change the oil again and go back to standard oil...go to a blend for high mileage...or is this not going to stop now that it's started...?