Gas mileage in my new Tacoma

Ever since they went to 10% ethanol fuels here i've never any fuel system cleaner. Years back MTBE was added to our gas to help clean the air, only to find out gas station in ground tanks that leaked were polluting the ground water, plus it left the throttle bodies on your engine all black, and sooty inside. Now with ethanol their shiny, and spotless.
 
Here in connecticut i've seen an average of 23 mpg at 55-65 mph.in summer with my 2020 v6 sr5. Right now its 97 degrees, and humid outside.
 
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