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Has Anybody Tried G100UL?

in 912 / 914 Technical Questions 3 years ago

Hi All,

I'm wondering if the new G100UL fuel has been used by anybody with a Rotax?  Rotax isn't on the "approved" list and my airport will be switching to that fuel as soon as they can.

I'm assuming it's fine...  And I can change to doing oil changes at 50 hr intervals instead of 25 hrs (I use 100LL exclusively) for my 914 equipped experimental (which I assume means I don't need the STC?).

Thanks,

Craig

 

  • Re: Has Anybody Tried G100UL?

    by » 3 years ago

    Hi Craig

    If this is a certified you need an STC to use it unless approved by your OEM.  If experimental you're correct, nothing required.  When a fuel is not on the listing at Rotax simply means it has not received any testing that they have qualified as suitable.  I am not familiar with G100UL and have no data on it myself so it is perhaps a boutique fuel or regional fuel at best for your area.  

    To be clear on the recommendations from Rotax.  Currently the latest SI, service information, on fluids has only 2 call outs.  50 hour for leaded fuels and 100 hour for unleaded.  They do suggest for activities such as flight training (lots of touch and go flights) a reduced time frame for oil changes due to excess build up in the system of contaminants especially for leaded fuels.  

     

    Cheers

     

    31954_2_SI-916i-001R1_915i-001R2_912i-001R7_912-016R12_914-019R12_Selection of suitable operating fluids for Rotax Engine Type 916 i Series 915 i Series 912 i Series 912 and 914 Series 1.pdf (You do not have access to download this file.)
    Thank you said by: Craig E Maiman, RotaxOwner Admin
      
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  • Re: Has Anybody Tried G100UL?

    by » 3 years ago

    G100UL is the new fuel from GAMI.  I believe they made a big announcement at Oshkosh in 2021.

    https://gami.com/g100ul/g100ul.php

     

     

      
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  • Re: Has Anybody Tried G100UL?

    by » 3 years ago

    Since it's 100 octane and in an experimental, you are going to be fine, and you'll be able to go with longer oil-change intervals.

    As the Wizard points out, the official Rotax guidance is 100 hours between changes if using unleaded fuel.

    Thank you said by: Craig E Maiman
      
    Report
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