fbpx

 

Working my way through the recently-released revision of the MML, I notice that footnote 4 regarding oil filter changes remains unchanged: a 50-hour interval applies if leaded fuel is used more than 30% of the time (05-20-00, page 10).  By contrast, footnote 5 regarding oil change has actually changed from the wording identical to past and present footnote 4 (that is, it applies if leaded fuel is used more than 30% of the time) to eliminating the 30%; it seems to imply that if AVGAS is used AT ALL, the oil should be changed every 50 hours (05-20-00, page 12).  I've never used AVGAS in mine to date but still change at 50 hours, so it's fairly moot for me but I'm wondering about any insights re the change.  

Of note is, unlike other changes, there's no "bar" next to that item, calling out the change.  

Any insights on this?  

 

/Ed

  • Re: New MML 912 Ed 4 Rev 1 and Oil Changes

    by » 3 days ago


    My question would be, if no leaded fuel is used (with the approval of G100UL or Swift 94UL) does that mean we can change oil at 100 hours?

     

     


  • Re: New MML 912 Ed 4 Rev 1 and Oil Changes

    by » 3 days ago


    Harold Gilbert wrote:

    My question would be, if no leaded fuel is used (with the approval of G100UL or Swift 94UL) does that mean we can change oil at 100 hours?

    That is Correct.
    First Oil Change at 25 Hrs.
    The Second Oil change at 100 hrs. (or 12 months after the 25 hr inspection).
    Then Periodic Oil changes every 12 months (1Year) OR every 100 hrs, whichever is the SHORTER Period.

    See Line Maintenance Manual ... Sec. 05-20-00, Pages 2 and 12.

    Many Owners change Oil every 50 hours regardless. 


    Bill Hertzel
    Rotax 912is
    North Ridgeville, OH, USA
    Bill.Hertzel@Yahoo.com
    Clicking the "Thank You" is Always Appreciated.


    Thank you said by: Harold Gilbert

  • Re: New MML 912 Ed 4 Rev 1 and Oil Changes

    by » 3 days ago


    Everyone I know changes at 50 hrs. for auto fuel and 25 for 100LL. The engine oil is like your blood. Disease it and die early. Same with an engine. The cost to have a healthier engine pays in the long run when reaching those high time hours on your engine.

     

    p.s.

    It never hurts to be a cut above the norm.


    Roger Lee
    LSRM-A & Rotax Instructor & Rotax IRC
    Tucson, AZ Ryan Airfield (KRYN)
    520-349-7056 Cell


    Thank you said by: Arnaldo Pessina, Harold Gilbert

  • Re: New MML 912 Ed 4 Rev 1 and Oil Changes

    by » Yesterday


    Thanks, Roger.

    As I said, I’ve been changing oil at the frequency you suggest. I guess my “real” question is if the apparent change means there’s no acceptable level of 100LL use without using the shorter times or if it was a typo. Wasn’t sure if the “new” language implied new learnings by Rotax about the use of leaded fuel. 


You do not have permissions to reply to this topic.