Accelerated spark plug wear?

455 Bravo Uniform

Final Approach
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455 Bravo Uniform
What would cause faster spark plug wear? I could’ve sworn that my plugs were replaced about 200 hours ago; I’ll have to check the logs to be sure. Many of the center electrodes are already way football shaped and now look worse than the ones they replaced.

IO-470. Champion massives. Rich of peak. Cyl temps less than 380. Power settings 22”, 2450 rpm most of the time. Have done commercial maneuvers for training during this period. Flown below freezing in Indiana up to >100 deg F in TX, NM, AZ.

I did a search on POA for “spark plug wear”, only 2 hits, learned some stuff, but didn’t find the answer I was looking for.

Swap Spark Plug Locations To Equalize Wear

Teach me about airplane spark plug wear
 
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