My car started making a different sound yesterday. I took it out for one last spin before winter and when I stopped it smelled like oil. Popped the hood to look for leaks and the motor which usually sounds like tapping valve train had a whine to it. Got back in and noticed the Oil pressure was a fair amount lower on the gauge than usual. Got it home and put a timing light on it and base timing was 8' advanced. The distributor is not loose and it was timed correctly before. If the shear pin did shear it would go retarded?