Air Venturi compressor question on coolants.

Good question. I have had mine now for just about a year and I’m still running the same distilled water I put in to start with also, I see no reason to use anything else in it being it’s used indoors and I don’t need to worry about it getting too cold.

I have 179 hours on my Omega and was wondering the same thing yesterday and looked at the directions. This is what it says - maybe different for the AV:

Change gear oil and radiator fluid after 3500 hours of use. Use non-distilled purified water, regular anti-freeze, and purple ice when filling the radiator. 16 0z. of radiator fluid. 1 OZ of purple ice, 1 Oz. of anti-freeze, and the remaining 12 - 14 OZ of fluid being non distilled purified water. in caps: DO NOT USE DISTILLED WATER.

3500 hours seems like along time. At my annual fill rate, I'll be 140 when I need to service my compressor. I'm going to email Todd the AOA compressor guru to verify.

My Hatsan Lightning specs say use distilled water. Sometimes I wonder who writes these manuals up. My drain and refill for coolant is very 100 hours or every year, whichever comes first. Coolant ratio is no less than 25% antifreeze(G105 spec’d) and no more than 50%. I went with a 40/60 mix, with a few ounces of Redline’s water wetter solution in the mix.