mldavis2
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mdlavis2 - Premium gas is recommended not required. You may loose some HP, but my understanding is the engine sets the timing when it senses regular/lower octain gas.
Yes, most cars today can accommodate regular fuel if necessary including my '05 GTO, but it sure doesn't like it. I would caution against using regular as a "regular" habit in the Stinger with either engine. They just weren't engineered for that.