The last couple of mornigs my girlfriend has drove the car and tells me later that it was "vibrating" well I took the car this morning and it was running very rough until it started to register a temp on the guage. I am not sure what is causing this but I just changed the oil this past weekend but it was the same synthetic blend 10w-30 I am at a loss right now. Other than the rough starts it runs very good even when it warms up. Thanks again