What do VW dealer think about BYO oil (as long as it's the correct viscosity)?
Mazda used dino oil so I used to bring Mobil 1 or Motul Turbo Light and gear oil and they were more than happy to use that instead of their standard Castrol on my old MX, are VW dealers likely to get anal about it (or at the prospect of making less money on servicing)?
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