Q: Skipping during idling and driving

Hello. Oil on the spark plugs can be an indication of a failed O-ring, worn piston, or worn valve guide. The first of which is less serious than the others, but it should be inspected sooner than later. Catching a more serious issue now may save your engine. It may be related, but don’t assume the worst just yet. When experiencing a misfire after replacing the spark plugs, the first step should always be to retrace your steps and make sure the plugs are installed correctly. Pay extra attention to the spark plug gap, which can be altered when you tightening the plugs into place. You will also want to verify that the spark plug wires are securely attached and are clean, dry, and tight. If the misfire is being caused by something else, it is likely it will show itself on a diagnostic scan, so have the vehicle scanned at your local parts store. You should verify the repair and then have the vehicle scanned if needed.