Engine oil.

[piunit_imp]

I'd follow the manual and use honda oil and filters,it's cheap enough,if you can afford the bike (purchase) you can afford the maintenance.Only caveat with me is use is low enough that mileage based oil changes wouldn't be done every year.Guess every spring and every fall would be best,and it's cheap insurance too!

Hi riceburner.
I can buy oils enough cheap on the Internet.
It's only troublesome. Ha ha ha

To each their own, I say. Enjoy the ride

Hi Motogeezer1949.
Of course I can enjoy owning and riding my CB.