As my earlier response generated a rude response from the thread starter, I have deleted it and will now rephrase it as a question.
What are the CAA requirements on the 44 oil change please? Is there a tolerance on hours? Can I top the oil up but not change it? If it burns a litre in 3 hours, is it effectively being changed (cycled) during normal useage?
I look forward to sensible, polite replies....