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My plane seldom leaves Florida so it never gets a hard freeze, only a few degrees below freezing. I understand that water has better heat dissipation properties than the Dexcool coolant. My engine is tightly cowled and tends to run hot (I removed the Evans waterless for this reason).

Given the above, instead of using a 50%-50% mix, would it be better for me to use more water- less coolant? Maybe 60-70% water. Would that allow my engine to run a bit cooler while still protecting from the occasional freeze? What do you think?
  • Re: coolant mixture

    by » 13 years ago


    Hi John,

    The coolant is for boil over protection too. Leave it at 50-50, even the coolant Mfg's recommend nothing less than 60-40.

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


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