by 
The Curious Bag
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<h4 class="dechead">On One Hand: Stick to A Schedule
The fuel filter prevents harmful contaminants from entering a vehicle's engine. If it is clogged, fuel efficiency and overall performance drop drastically. Owner's manuals generally offer a regular mileage or time interval at which you should change the fuel filter. The Universal Technical Institute recommends a change every 12,000 miles. General Motors recommends a change for most trucks every 25,000 miles.
On the Other: Every Car is Different
Driving conditions, fuel quality and many other variables can alter the lifespan of a fuel filter. For example, according to the EPA, cars beginning on biodiesel should generally receive a new fuel filter after the first tank. The way to be sure is to check the filter often.
Bottom Line
The clear wrong answer is to ignore the fuel filter completely. An ancient filter can cause stalling at certain speeds or even prevent the vehicle from starting. Checking the fuel filter should be part of any vehicle's regular maintenance schedule.
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