Old 07-20-2008, 05:00 AM
Thread Starter
Join Date: Jul 2008
Posts: 2
Default fuels

does anyone run reg. gas? is it a problem if you do? i a wondering if it would make a difference in gas milage.
Old 08-22-2008, 07:56 AM
Join Date: Jul 2008
Posts: 7
Default RE: fuels

My dealer recommended regular fuel for my 2008 RX350. It runs great and gets better gas mileage than my 99 Mercedes ML 320 did. No problems at all.
Old 08-22-2008, 09:15 PM
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Join Date: Aug 2008
Posts: 27
Default RE: fuels

The higher the compression ratio, the more octane molecules are needed in the gas (as you know 89 octane has less then 93 octane). Some cars that have high compression ratios need more octane because octane will not spontaneously combust like hexane, etc when compressed.
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