I'm thinking about replacing my oil cooler.  Via some searches, it seems like Rotax has improved the design of them.

Does anyone have any details?  My plane currently has the older Rotax small oil cooler installed.  I have space under the cowl to switch to the "medium" sized one, but if the newer "small" version cools substantially better, it would be easier to just replace it.

I was flying in hot weather recently and during the climb, the oil temp reached 250F.  It eventually cooled off to 230F in cruise.  For my aircraft 250F is in the green arc, but ideally I'd rather have better cooling.

thanks for any info or advice.


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