OklabyGodhoma
Full Access Member
Been running Mobil 1 in all my vehicles for the last 15 years. My Yukon XL got changed at 500 miles and never had anything else since. I go a minimum of 10,000 miles between changes and have never had a problem with any of my vehicles using oil or leaking oil. As far as the oil monitor goes I don't trust it and as far as synthetic goes it waste oil trying to get you to change before it is actually necessary. There are also several good threads in the forum about this subject as well.