For my new 1999 I sent in my oil during the first change over to M1 5-30. Here is the response from Blackstone: So good news it appears. They only thing that is listed high is Boron which is has units of 145 where the expected average is 65. What does a high Boron count mean? %fuel was <.05 and 0 antifreeze and 0.0% water. Overall, decent news.