How Often Should You Change Spark Plugs On 5.4 Triton?

How Often Should You Change Spark Plugs On 5.4 Triton? You can change them now if you want, as they are cheap, but you should change them probably before about 75k miles. What year 5.4 have spark plug problems? The original equipment Motorcraft brand spark plugs that were factory installed in many late model (2004