Hey everyone, It's almost time for my next oil change, and I really want to try out synthetic oil in my car. I have about 87K and have been using a synthetic blend for the past 20,000 with no problems. Will switching to a full synthetic oil cause any problems with my car? I was searching but I cannot seem to find a definitive answer! I believe my motor has been rebuilt at some point (it has Jan 2000 stamps on the block, found out when changing clutch), so I don't know the actual mileage of the motor. Go figure, it has a clean Carfax report too So what do you recommend? I was thinking Mobil 1 5W-30 with a Motorcraft filter... but do you think I should stay away from synthetic? Also, I've heard you may need to do an engine flush prior to running a full synthetic oil, is that true? Thanks!