Oddly enough, Citroen fitted hardened valve seats anyway, which cope well enough with regular driving, it's only when the engine is really ragged you'd need either a lead substitute or higher octane fuel.kiwi wrote:What about VSR Doc? If the car has not had its head off and valves replaced with hardened valve seats then is that not a problem to not use a lead additive that LRP has or had?
It's largely down to unleaded not burning aswell as "proper" planet killing fuel.
4 star is still available in small quantities over here, but at £4+ per litre you'd have to be REALLY rich to fill the car up with that!