Filled up in Hollywood today and noticed premium is now 91 octane (as opposed to 92). Apparently, California is removing the additive MTBE and replacing it with ethanol (or something else) which lowers the octane a point. This should have no effect on our engines. At least premium is finally under $1.90 a gallon in L.A. (I'm sure the forum readers east of the Rockies are laughing right now). It'd be a whole different deal if the octane was going down and the price was going UP!