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We've now traveled another 700 miles and the numbers have improved ever so slightly, but definitely still less than on the Marathons. That's a total of 1350 miles so far on the "G" tires. Weather is warming up as we head south, so that may have contributed to a bit better fuel efficiency. The G614's are a wider tire, which means there's more contact surface meeting the road, hence; more resistance. I know they're a heavier tire, but believe it or not, we've actually lightened our cargo, so our GVWR is actually less than last year. I was initially just trying to figure out why my mileage was down when all the other variables seemed essentially the same. This is the perfect forum to find out what others have experienced and determine if this is just some anomaly or if it's consistent with what others have found. Thanks for all your input and thoughts.
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