Reduced gas mileage after new tire replaceme t

Chevrolet Silverado 2014 Z71 Extended cab  70000 miles
I was averaging 22.5 mpg with the stock tires. I bought the same tire and now my gas mileage is approx 19 mpg. I put in a new airfilter and it did not help. The tire pressure is 37 psi.
Eric from United States 4 years ago  
ER
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