Forum Discussion
Cummins12V98
Aug 25, 2017Explorer III
allen8106 wrote:
I use a full synthetic also in my Duramax but I'm scared to death to go over 5000 miles.
Don't be! Call Blackstone and get a sample kit for your next change. Based on your oil results ask then what interval they would recommend. Be sure to get the TBN test.
About Travel Trailer Group
44,028 PostsLatest Activity: Mar 27, 2025