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Comment and Question.
I've got the 4dr non-sas OBX, went from stock tires to 275/70/18 General Grabber ATX. My MPG dropped by almost 2 (1.8). 10% seemed like a big drop.
In a perfect world do I need to use forescan or have my dealer "update" to car so it knows the tires are bigger? I'm assuming the bigger tires have better MPG then the computer is guessing.
I've got the 4dr non-sas OBX, went from stock tires to 275/70/18 General Grabber ATX. My MPG dropped by almost 2 (1.8). 10% seemed like a big drop.
In a perfect world do I need to use forescan or have my dealer "update" to car so it knows the tires are bigger? I'm assuming the bigger tires have better MPG then the computer is guessing.
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