Based on this thread, I decided to change the Mobil One in my Honda 2000 EU today, its been at least five years, the oil NEEDED changing. Still starts on 2-3 pulls, load bank it with your wife's hair dryer for 5-10 minutes and let it cool down for another 5 minutes.

I did it. 8900 KW gas powered electric start. Real noisy. The Honda is mechanically
designed to be real quiet..
You have to install a transfer box near your load center. (Power panel.)
I don't have the automatic transfer like my sister does.

I have to go out and turn off the main breaker. Tag it out so I don't backfeed into the utility company.If you are not an Electrician... Hire Ohman or some company to help you with your
request.
It is so cool. When the power goes out, Your neighbors will want a hot shower or charge all the battery junk they need to survive..
Barter. Nice shower equals two cans of corned beef hash.