It depends on the type of carb more than make of engine. Better to put a small amount of 2T oil in all the petrol used.We leave the petrol in our lawnmower and never have it serviced ( a concious decision it did not seem worth paying for a service on a £100 mower) the last one lasted for 15 years!!!. Sounds like the Honda isn't as reliable as made out or optimised for fuel used in non UK markets