smashweights
Well-Known Member
So I'm midway through a long road trip we have made half a dozen or so times over the last 2 years. Normally I get 21-24mpg highway per the dash readout. So far I'm getting 18mpg, which is just barely better than my mostly city commute to work mileage. City mileage has been the same. We have basically the same load, same time of year, same cruise speed, ambient temps, same fuel grade, etc. Only thing different I can see is I got new tires. I know you can get a little drop with new tires but this seems excessive. What else might be the issue here? The old tires were like 4/32" tread so it's not a huge difference in tires either. Inflated properly to 38-39psi.
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