| Thanks to all for taking the time to reply. You are right Dano, no red line is marked.
8 to 81/2 sounds to be about optimum then. I am lucky enough to live not a million miles from Forza-Italia / Baines Racing at Silverstone circuit - so the crucial proper servicing is sure to be done.
Speaking generally as a new member of the DSC (and I have not been anywhere or met anyone yet) - its really encouraging to a beginner 'Duke-fiend' to have such a brilliant source of enthusiasm and knowledge to draw on.
Cheers again,
Andy | 
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