Warmi
Line Up and Wait
I was looking at specs of a light plane using this very engine …I can’t seem to find where they claim 15gph. I did see 0.9lb/hp/hr at cruise with 188hp. Which roughly equals 188 x 0.9 / 6lb/gal = or 28gph, which is still pretty good for a turbine.
https://www.tl-ultralight.cz/en/ultralight-aircraft/stream-turbo