09 Ford fusion used to read 500 mile to go before empty. Now reads 425. Is there a prob or is this norm?

09 Ford fusion used to read 500 mile to go before empty. Now reads 425. Is there a prob or is this norm?

Generally speaking, cars lose a bit of economy as they age, but that seems to be a bit over the limit for lost MPG due to age. May be the sending unit in the fuel tank is not reading the fuel level accurately. Have you noticed if it seems accurate on the miles per tank? Is it correct? Or never let it go that far? It may need a fuel filter change and/or a tune up too.

Have your driving habit's changed, low tire pressure

There's nothing wrong with you're car. That's basically a calculater guessing how many miles you have till empty. When you use the throttle and drive hard on the trottle (use more gas) , your mpg changes so it recalculates the amount of miles till empty. Same if you were to drive light on the trottle (using less gas) your mpg will go up and the amount of miles till empty will up and recalculate. So your car is running like it should.