Seems like it would be in his job description to at least answer you, if only to tell you that it's top secret information. you might want to call national headquarters and complain/ ask them the interval.

__________________
-Marty

1986 300E 220,000 miles+ transmission impossible
(Now waiting under a bridge in order to become one)

Reading your M103 duty cycle:
http://www.peachparts.com/shopforum/831799-post13.html
http://www.peachparts.com/shopforum/831807-post14.html