I have the EU20i and run in eco mode, fridges, serious power tools, no problems. The inverter does the regulation so the revs are not important like in the old days. One thing though, I was a lawn mowing contractor for 25 years running Honda HRU 216, 6Hp mowers, and an avid motorcyclist. Engines, of all types, need to have the cobwebs blown out, so I run it full power every now and then to blow off any carbon that may have built up on the valves or in the exhaust system. Running 95 is the best we -contractors- believe for these little engines. I run 95 in everything, and give everything a bit of 'stick' from time to time
