'Cos the roads in the UK are so congested, no UK driver can give their car a spanking??
Seriously, this sounds like marketing driven Bull-tish to me ... Marketing overriding the engineers for some ill-defined marketing purpose.
To me, oil is the cheapest thing you can put thru the engine ... mine gets changed every before every track event and/or every 5000km - might be a bit overboard but engine longevity is all about regular oil-changes with a qualify oil (I use Motul in he Z24 btw)
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