[wilf leek]

Francis - if it makes you feel any better, I always use thermocouple type instruments to check out the real temperatures under the hood (and at the back axle too, which currently is getting far too hot on the track).
I would never trust a Smiths instrument (or most other car instruments for that matter) for an accurate, absolute reading.

Like the name - you sure you are, if not the prince, not one of his relations?