Poor MPG

My mpg is about 24 80% of miles on freeway I don't drive it hard never have 96,000 miles I have changed spark plugs clean filter and housing for filter new o2 upper and lower sensors cleaned MAF and MAP sensors reset the car by unplugging battery have no code had Honda do diagnostics's valve adjustment and fuel induction which they said would help done nothing changed fuel pump and filter also tires inflated 35-40 psi also checked for brake drag can't figure it out or think of anything else also coast when I can never go over 65 mpg usually more like 60.