yes you can find plenty of users with OCD disease on it....BUT!
Fuel dilution can quickly be an issue in a generator which sat for a year or two...stuck needle....or dirt on a needle seal.....that causes it to run pig rich! Or simply cheap non adjustable chineese carb....
Additionaly.....these engines has splash lubrication...so quality of oil is of more importance (no abundance of oil film between moving parts).
And last (but not least)......there is no such thing as "CONVENTIONAL 5W30" oil here in EU.....