According to their site, their 2-cycle engine oil already contains fuel stabilizer. However, I will be storing regular gasoline in a gas can and I want to add Stabil to it so it lasts longer. I will only mix it with the Stihl engine oil once I pour it into the leaf blower's gas tank. So, will it cause any problems that the gasoline will contain both Stabil AND fuel stabilizer present in the engine oil? Sorry for the newbie question - I've never owned anything with a 2-cycle engine in it before. Owner's manual doesn't mention anything about using Stabil. I suppose I should ask Stihl this question directly.