only has 63000 miles but getting low mileage lately - 19 miles per gallon. on 2000 Acura TL

It used to be getting 25-26 miles per gallon. And I used premium gas (91 octane). What's wrong?

Asked by for the 2000 Acura TL
2 answers
Check air filter, plugs, oil changes, tire pressures and additional weight carried in the car. Are the brakes dragging? Driving habits changed? All city vs freeway? All these affect mpg. GL
Check engine light been on?