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To: Rambi who wrote (212892)	7/21/2007 11:49:51 AM
From: Stevefoder	Read Replies (1) \| Respond to of 794032

91 is recommended. What's the difference? And will I kill the car? It never hurts a car to use a higher octane. The higher octane is a measure of the gasolines ability to resist detonation or knocking (ping you may hear during combustion). You do not want gasoline to explode in the engine, you want it to burn. A high compression engine needs a higher octane to prevent the explosion (knocking). If you use a higher octane than necessary all you are doing is wasting money. If you use an octane that is too low then you can have knocking and can damage the engine.

To: Rambi who wrote (212892)	7/21/2007 12:04:49 PM
From: miraje	Read Replies (3) \| Respond to of 794032

And will I kill the car? Not at all. 91 octane, rather than 93, is recommended for high performance and high compression cars because that's the highest that's available in some parts of the US, including California. Consider 93 as an extra "high calorie" treat for your car. :-) One thing I would recommend is not to patronize Cheapo Charlie stations, including Costco, exclusively, as their gas does not contain the best valve and injector cleaning additives found in top tier gasolines, such as Chevron, Texaco, Shell, etc. Throw a bottle or two of Techron in your tank, once in a while, for insurance, if you use discount gas on a regular basis. BTW, I'm a bit of a car nut but promise not to subject the thread to much more of this OT energy stuff..