Could be. It's sure as hell not as simple as boost or detonation.
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God I miss owning a Ford not!
so many weird issues I had - pre ignition, detonation - carbon golf balling the valves & seats, very selective on heat range of plugs and type & on & on...
Funny haven't done any major work on the GM product, may be I'm lucky\
- but I still reckon Ford can't build these 6's with any decent quality or durability with the ancient engine factory in Geelong.
So another story like this just doesn't raise an eyebrow any more.... lucky it got to 100K with out the head off for work.
Very true our Ls's will go for a coupla hundred thousand K's without a spannering!