Quote:
Originally Posted by p2roverman
That's news to me.
I use OAT because that's what the manual says, and for some reason (what?) I thought it was essential for the health of our engines.
But if OAT is bad for the rubber hoses, why was it originally specified?
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I have no idea why it was originally specified, probably because it lasts longer and brought costs down for fleet service managers. OAT is nasty stuff, IAT such as silicate based antifreeze won't do your engine any harm and won't degrade your rubber hoses.