Ford, kinda !
Certain Ford engines use an internal timing belt (rubber) that will degrade unless certain oils are used - changing to a non-safe (regular) motor oil will cause the belt to fail prematurely.
224 publicly visible posts • joined 13 Jul 2012
*Sigh*
- You are free to "refuse to deal with HMRC" - you can remove yourself from their jurisdiction!
Of course, this means that you're no longer elegible for services & protections afforded the tax payers - like courts, the NHS, schooling for the kids etc.
Best of luck with that ...