Well that is Generacs premium engine , pressure oiled with oil filter,
many hondas have no oil filter. Manufacturers have different lines of
quality. But use-how heavy the load, and oil are key, They do run to
3500+hrs but I dont know what loads were used. At heavy load maybe
1000-1500. Ive heard of many people getting 10000-14000 on little Honda
2000w EU run conservativly, those are load dependant RPM, and run from
900 - 3600 rpm producing power. Use is key, load dependant-controling
rpm and conservativly run are best. in regular 3600 rpm units. Take a
3000 EU and use 1-500 watts running it at 900- 1200 rpm and it will
outlast anything, theoreticly 20000 - 40000+