Stopped at the dealer this morning for an oil change. With close to 3 months on the warranty on my new motor, this is the only reason for still using dealer. I got the oil changed and headed off to work which is only about 1-1/2 miles away from dealer. My ears perked up real fast about a block from the dealer when I realized how quiet the motor was. The old Mobil One 10W30 only had 4,500 miles on it and I use Volvo OEM filters (Mann). The engine feels and runs the same just quieter at idle. I never noticed this before, after changing the oil. Have any of you noticed this with your cars with fresh oil.