what can i install or do to improve power and consequently fuel mileage on 2003 Kia Sedona

Rookie cbe0621eac06868b3efe0d8d1d3611e23c60d3114864ea2ec19a68cfbd3eebab
car runs ok but only gets 13 mpg
(2) Answers
Power and fuel mileage, let me know where you find that. These usually have great pwr.
and it should get better mpg. May need a tune up, check air filter ect.
(1)Tune -up (2)If it's like mine it really needs a fuel injector cleaner about once a month, minimum every oil change(like a Lucas product works very nice and you notice immediate difference).