Yes really, I remember reading the article.
Every oil supplier is regularly checked in the UK, as are main dealers especially if there are complaints.
BMW EU recommend 10w60 for the M3, but in the USA there was a class action lawsuit because engines were failing as the oil wasn't doing its job, so the USA uses a different grade oil to Europe, but if the engine goes pop over here and you haven't used 10w60 then BMW would legally be able to reject a warranty.
In regards to the Golf R, older it gets then it may develop faults with the injectors or timing chain.
Some have issues with the inlet manifolds.
They're all potentially serious engine problems that could be covered under most warranties.
Word of advice though, check the small print on what happens if you have breakdown cover, or report a fault but drive the vehicle to a workshop when you know there's an engine/clutch issue.
I had a customer who had clutch issues but because he drove it to the workshop and didn't get it recovered after ringing the warranty company to report the initial fault, the warranty company would only pay for the Clutch, not the flywheel that was also knackered.
They used the excuse that he drove it, thus worsening the condition of the flywheel
