Thanks George for the jag website.
I'm on my fourth jaguar, 3 X Type's and now have a XF 2:0 litre Portfolio.
I've used the same local garage for over 24 years, and i buy the engine oil and oil filter, diesel ,air and Cabin filters and the garage does the service while i wait.
The car has just had it's second 2 yearly service, and the first service was carried out by the jaguar dealer that sold the car and the air filter had been in the car from the day it was Built as it had the date stamped on the filter and that's 4 years and they had actually changed the cabin filter as they had written the date on it, and they don't seem to apply some ceramic grease to the slider pins on the brake calipers. I'll probably do the intermediate service myself as I have a 12 Volt pump and the oil filter is in a good position with it fitted at top off the engine.
Thanks again for the information that you've supplied.