It looks like Castrol and Valvoline aren't the only ones taking shots at Mobil 1. Check out these video clips:
http://www.youtube.com/watch?v=QPlxdIhUiQM&feature=related
http://www.youtube.com/watch?v=wB_UCKRjYx0&feature=related
http://www.youtube.com/watch?v=C84FcqTEQBw&feature=related
It appears that Mobil 1 doesn't do well on certain wear tests, and everyone is jumping on the opportunity.
http://www.youtube.com/watch?v=QPlxdIhUiQM&feature=related
http://www.youtube.com/watch?v=wB_UCKRjYx0&feature=related
http://www.youtube.com/watch?v=C84FcqTEQBw&feature=related
It appears that Mobil 1 doesn't do well on certain wear tests, and everyone is jumping on the opportunity.