most causes for fuel mileage is driving habits. try changing your driving habits to see if it changes

are all your services up to date as per owners manual??? all filters and fluids clean and up to date??

tire in good shape, alignment perfect??? all these are a tremendous help

roy

I am 65 years old I don't exceed the speed limit as I said before, the car has been tuned up I am talking about the car used a half tank of gas driving only 50 miles I need a better answer this has been going on for sometime now. there has to be another reason. yes to all of your questions fluids , filters tire in good shape




thanks
\ viola

then some of your post did not come up as there was very little info on my original reading.

how many miles???

have the plugs been changed?? air filter???? fuel filter???? do you let it warm up for while before driving??? what area do you live in?? asking as higher elevations tend to give lower mileage

roy