Hello to you all, many thanks for your assistance and advice.
My mate Garry is a mechanic. He showed me 2 of his 'tricks of the trade' in the form of his useful booklets, first one shows the timing belt routes for virtually every car / engine type you should see on the road in UK (even includes the Phaedra/ Zeta / Musa), second booklet shows how much oil to replace when draining the engine, whilst it is hot and via the sump drain plug.
For the 1600 HFie the book says 5 litres of oil. We drained it, waited, then poured about 4.5 litres new oil inside, waited again, started the engine, topped up the oil by pouring the remainder of the 5 litre container.
Hey presto, 5 litres = exact measure to top limit on dipstick. I will do a run about in the morning to find out if more oil needed.
If I had some decent scales I would have weighed the oil first, just for curiousity !
I showed Garry my manual showing oil in kilos, his reaction was typical, "bloody Italians, always have to do things differently" unquote. This attitude comes from his experience as he maintains the very varied Lancia collection of Dr. Brian Hands (Flavias, Aurelia sedan, Augusta etc.) who lives a mile away from us both. Luckily for myself, Garry has his workshop less than 20 metres from my house, to help me with the engine swap we bartered, I made him a chicken coop / run and also supplied 6 healthy chickens.
Now, who wants some cheap eggs ?
All the best, Keith