All I was trying to say was READ YOUR MANUAL... it states, "Use premium unleaded only"... now what does that say to you? Use 87? NO... It even goes on to say that you should use 91 octane or above. I don’t particularly care about the price.... when your manual tells you to use something you don’t go buy the cheap (inexpensive) gas because you want to save 30 cents per gallon, especially when the manual tells you that if you must put lower octane gas in your car only put enough in to get you somewhere where there is 91 or higher octane and also that you shouldn’t run over 3000 RPM (could be 3500RPM) until you get the higher octane in the tank. At least that is what it says in my 89 300E manual.