Originally Posted by SkiSmuggs

I saw that video and had to laugh. It's like asking a fuel tanker driver which is the best gas to use.
The worst I experienced was when they replaced my over gapped plugs at 42K, I told them about the spark blow out from being over gapped. Mine were all over .040 and two had the electrodes about gone. When I had them replace plugs at 60K because one was missing, I got it back with 3 of them missing. Pulled them myself and they were way over torqued which had cracked the porcelain. Replaced them myself but called the service department to tell them that it only took 11 ft/lbs. The service guy told me they put them in tighter due to reports of spark plug blow out! They completely misunderstood what I had told them previously.