Hello,
I change my oil in my 2003 CTS 3 times a month. I drive 167 miles a day. I have done this all my life to all my vehicles. No dirt or grime in my engines. I use Vavoline synthetic.
I change my oil in my 2003 CTS 3 times a month. I drive 167 miles a day. I have done this all my life to all my vehicles. No dirt or grime in my engines. I use Vavoline synthetic.