I will say though, I gave up 100 miles a tank from the Z, on my trip to Ohio in the Z, I went 510 miles before I had to fill up, having tank with 3 less gallons could also be a culprit.
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2011 Mustang 5.0 | 3.55's | Lethal Performance off road H-Pipe | Magnaflow Muffler Delete | JLT CAI/Bama tuned 417whp/ 404 ft/lbs
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