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Message: <blockquote data-quote="Louisiana_CRX" data-source="post: 5643148" data-attributes="member: 570083">It seems on the dash mpg gauge it goes up with the traction control off...I seldom run it too hard...I play in it every now and then...but nothing major....also I don't hear any knocking in the motor from 89 octane gas...I've noticed in the miata after it sits for a while it will make some clattering though its designed for lower 87 octane...usually a tank of 93 straightens it out....I figure the 87 gets weaker with age....My 87 Caravan 3.0 mitsubishi V6 had 2 year old gas in it ...can't remember the grade but most likely higher ...it still cranked and the motor sounded fine</blockquote>

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