Didn't the original poster state that the instructions specifically state NO LESS THAN 18% oil???

Seems self-explanatory to me. Use 18% oil. Most any airplane fuel would satisfy this requirement give or take a percentage point here or there. Is there a secret formula that we should be using to determine how much oil can be subtracted from the mfrs recommended minimum?

Granted, none of US with our golden needle tweaking fingers would ever over-lean a motor, or subject it to anything but optimum tuning but since warranties are no doubt involved, I'm not sure it's wise to advise a "newbie" to deviate from the instructions.

Seem reasonable?

'Race