Thanks for suggestions daox. I am looking at a bullydog tuner scan gauge but it is pricey. I am going to block of the lower grill as you mentioned. After a few weeks I'm going to put my ram air on the car and see which is better. Just wanted to try the wai to see but haven't wrapped my arms arround the idea. Had taller tires and a ram air on old versa but never checked mpg. And yes it is mostly highway but not interstate.realy appreciate advice.
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