Tech advise on mixture

[AndrewWolfeUK]

Hi there guys,

When i took the porka to get the brakes done they said something about the mixture. Like it would be o.k.for city driving but if i went for a motorway blast i could burn internals out?
They said i could sort it by installing a switch, like the vintage racers to flick between mixture settings.

what does this sound like to you guys?

[emcon5]

What car/engine/induction?

[jeff m]

I assume they thought you were a bit on the lean side.
I seem to remember you have MFI, so 4 - 4.5 co should be good.
That's higher than the book but that's about where most are with an older car.
Jeff