RE: Welcome to Club SAITO !
McChicken, you're full of it, I have used WildCat 10% and 15% with 18% lube for about 16 years. Last year I got 6 gallons of PM 15% with 18% lube and it ran identically to the WildCat. The WildCat with 16% lube is actually easier to tune that the 18% lube but not recommended except in RCV engines. Simply put, your tuning issues weren't your fuel.