Hello, I'm pretty new to mopeds and when my recently purchased 1979 honda express ran out of oil, I went to the honda dealer and bought this stuff manufactured by honda and it works great except it's $5.50 a quart. I was looking at cheaper 2 cycle mix oil, but the TCW III labeling made me nervous. I was wondering if I can use TCW III, 2 cycle outboard oil, or any other 2 cycle oil for that matter that will work good in a honda express. I just don't want to hurt my new baby. Thanks.