Date: Mon, 13 Mar 2000 21:36:38 GMT From: "Dan Matz" <dmatznopsamnatha.net> Subject: Re: 99 9-3 Gasoline
>I have a 99 9-3 SE and have always been told that I needed to run Super >Unleaded due to the Turbo. In light of rising gas prices in the US is this >really true? I'm no mechanic so please respond as "layman" as possible. > >Thanks!, >RB In a turbocharged engine, the compression ratio changes depending on how much the turbo is boosting. If the octane rating of your gasoline is too low for the engine's compression, it will detonate early (pinging or knocking) and may misfire under boost (as the compression ratio increases). If this happens, it will throw a code for the engine's knock sensor and in time may ruin the knock sensor. You may be able to find a cheaper alternative at an auto store, some sort of octane boosting additive. Ben
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