- May 4, 2013
- 8
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my hubby wants to put super unleaded in our stang, he said a friend of his said he got more miles out of the 91 octane so he wanted to try it with our car. However, i dont see anything beneficial in changing the gas in the car, and im wondering if it could have negative effects in the long run. we dont have any engine/performance mods (yet) everything is stock.