Originally posted by 351coupe
If you use conventional oil,stick with it.If you switch to synthetic your gonna start getting oil leeks.Unless you have a fresh motor to begin with.
I've read numerous articles that support this. If you got a high milage car you should not change to synthetic if it used regular previously. All the small areas where the old oil clumps will now be dissolved by the synthetic leading to leaks, you'll end up w/ either gaskets leaking, valve stem seals leaking, or other areas where it would be detrimental to the motor.