There seems to be a lot of back and forth advice on coolant. Specific brands were recommended then discontinued. 50/50 mix was allowed then maybe not. Service Instructions / Bulletins were issued then supplemented.

It looks like the latest information I can find on the 912 UL says to use Evans Aero Cool 180. There doesn’t seem to be a good on-line source for this in the US.

I’m looking for the simple answer. Are US 912 UL owners buying Aero Cool from overseas or are you using other locally available brands allowed and recommended by Rotax?

Thanks.