so 0.9v is the richest end of the scale.

My o2 sensor is working that is for sure, but I cannot tell if it proves that I am running overly rich or not?

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2016 Monsoon Gray Audi Allroad - 21k
2008 Black Mercedes E350 4Matic Sport - 131k
2014 Jeep Wranger Unlimited Sahara - 62k
2003 Gray Mercedes ML350 - 122k