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Thread: Coolant and Oil

  1. #1
    Senior Member Esser's Avatar
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    Default Coolant and Oil

    What is everyone using for coolant and oil? I know the Evans stuff is no longer recommended. The rotax-owner.com says any silicate free. Any comments?

    I can start the engine for the first time as soon as I have fluids in her!
    ------------------
    Josh Esser
    Flying SS7
    Rotax 914iS
    AirMaster Prop

    Edmonton, AB, CWL3

  2. #2
    Super Moderator Av8r3400's Avatar
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    Default Re: Coolant and Oil

    I use orange Dex-Cool per the rotax recommendation.

    I also like a synthetic oil, not a semi-synthetic, so I have used and still use Mobil-1 Racing 4T, 10W40. I run 92 octane, uncontaminated autogas or swift.
    Av8r3400
    Kitfox Model IV
    The Mangy Fox
    912UL 105hp Zipper
    YouTube Videos

  3. #3
    Senior Member Dave S's Avatar
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    Default Re: Coolant and Oil

    Started with Evans originally when Rotax indicated it was better than sliced bread - went to the Orange Dex Cool when I changed out the old brass radiator for the aluminum radiator - both CHT and oil temps ran significantly cooler after the switch - don't know how much of that was due to the coolant and how much due to the radiator. It's going to be easier to find dexcool on a trip if needed compared to evans,





    I started out using Mobil-1 Racing 4T, 10W40 (full synthetic) however, changed to Sport 4 (Semi Synthetic) because I don't always have access to lead free fuel on trips.
    Dave S
    Kitfox 7 Trigear (Flying since 2009)
    912ULS Warp Drive

    St Paul, MN

  4. #4
    Senior Member kmach's Avatar
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    Default Re: Coolant and Oil

    Dex-Cool and Aeroshell Sport Plus 4
    Kevin,

    Kitfox Outback
    912 ULS
    Airmaster AP332CTFH-WWR70W
    Summit Aircraft Wheel Skis
    C-FOXW

  5. #5
    Senior Member jrevens's Avatar
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    Default Re: Coolant and Oil

    Quote Originally Posted by kmach View Post
    Dex-Cool and Aeroshell Sport Plus 4
    Me too. (The site said my message was too short - now itís not).
    John Evens
    Arvada, CO
    Kitfox SS7 N27JE

  6. #6
    Senior Member Dave S's Avatar
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    Default Re: Coolant and Oil

    OK, I am busted!.....When I said sport 4 in the earlier post, I meant Aeroshell Sport Plus 4.
    Dave S
    Kitfox 7 Trigear (Flying since 2009)
    912ULS Warp Drive

    St Paul, MN

  7. #7
    Senior Member jiott's Avatar
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    Default Re: Coolant and Oil

    I also use Dexcool and the Sport Plus 4. It is the perfect combo for mostly 92 clear mogas with occasional 100LL on trips.
    My personal opinion is that fully synthetic oil is a waste of money when you change it every 50 hours. The synthetics were mainly developed for extended change intervals and higher operating temps, none of which exist on the Rotax 912 aircraft engine.
    Jim Ott
    Portland, OR
    Kitfox SS7 flying
    Rotax 912ULS

  8. #8
    Senior Member Esser's Avatar
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    Default Re: Coolant and Oil

    Quote Originally Posted by jrevens View Post
    Me too. (The site said my message was too short - now itís not).
    This made me laugh!


    Thanks everyone for their input. Iíll see if I can get the Aeroshelk Sport 4 at the local FBO
    ------------------
    Josh Esser
    Flying SS7
    Rotax 914iS
    AirMaster Prop

    Edmonton, AB, CWL3

  9. #9
    Guy Buchanan's Avatar
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    Default Re: Coolant and Oil

    Dexcool and Honda HP4.
    Guy Buchanan
    San Diego, CA
    Deceased K-IV 1200 / 912uls / 70" Warp 3cs

    gebuchanan@cox.net

  10. #10
    Senior Member Slyfox's Avatar
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    Default Re: Coolant and Oil

    I feel like a rebel. I just put in Amzoil motorcycle full synthetic. yes I change it every 50 hrs. I also use the orange stuff for coolent have forever. I was using aeroshell like everybody else. I noticed something this time. generally I put in like 2.5 quarts for fill. If the fill isn't just right it will come out the vent. well with the amzoil I by mistake overfilled the tank with 3 quarts. I thought oh bother, lets see if it comes out the vent, hasn't done that this time. anyway I also just go to the station and put in 10% alki as well. it's had a steady diet of this stuff for years and many hours. no ill effect only thing I notice is mo money for fuel. haha

    one more thing. I'm sure I'll catch hell for this. I use a wix 51056. can't get myself to spend the money on a rotax filter. done that for many many years and thousands of hours. I don't burp the engine before start, just turn it over about 18 compression strokes. never a problem from that also. oh one more thing. when I change the oil I never crack the oil lines. I remove the filter, fill the new one and install. suck out the old oil in the tank and clean (helps me to see if there is anything in the tank, aka pieces and parts.
    I than put things together and crank the engine with mags off until there is pressure than hit the mags and start. oil change is a non event. I than put a piece of tape on my stick somewhere with date and hours for next oil change. put it in the book and go fly.
    Last edited by Slyfox; 06-13-2018 at 01:12 PM.
    steve
    slyfox
    model IV 1200-flying
    912uls
    IVO medium in-flight
    RV7A-flying
    IO-360
    constant speed prop

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