Truck service place should be able to do it. But I’d like to suggest you consider doing it yourself. The Ford V10 on an E450 is, hands down, the easiest vehicle on the planet on which this service can be done. Access (ground clearance) is huge and both the drain plug and the filter are right there on the bottom of the engine. 20 minute job and barely get your hands dirty. Costs less than $50 if you do it yourself. Less if you don’t use synthetic.
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