unleaded needed? - chris madley
I have recently become owner of afiat twin cam powered MG Midget, should I be using unleaded fuel in it and what would the consequences be if it needs it but had been run for a couple of thousand miles without it?
RE: unleaded needed? - honestjohn
Dear Chris,

Sounds fun. The alloy 16v cylinder head of your Fiat engine will already have fairly hard valve seats which are probably steel but may be cast iron depending on the vintage of the engine. If they are steel unleaded is okay. If not, use LRP. But you might as well use LRP anyway because the octane rating is closer to the octane rating the engine was designed to run on.