One last thing, this is directed to Big-Foot's comment on the markiting of the Atkinson Cycle VVT engine. You are guessing that the 87 octane rating on this engine is being influenced by marketing then what it should be (from the engineering data)? If that's the case then the engine (Atkinson Cycle VVT) in your opinion should be rated with a higher octane right? Then we are back to the point that the recommended fuel from the engineering department is what you should use. Period. Anything else is a waste, right?