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Originally Posted by JDPascal
Using the wrong grade may have more of an effect than changing grades because of carbon buildup and an accompanying compression shift.
That quick burn might affect the NOx readings. If I remember right, the quick burn has a higher temp and raises the NOx.???? You should double check me on that one though!!!????
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Thanks, JD
I've been using regular which I believe is typically 87 octane since I've had the Cherokee for the past year. Does anyone know what the recommended octane rating is on an 88 w/ the 4.0L engine ?