I just did the change, and pulled out the oil filter to gain better access. It all went quite well (apart from having to cut the old line to get it out, but that doesn't matter, does it?). I had to buy a different banjo to mount on the turbo (my Ford FGX is an ex-police unit, so they probably modified it in some way), but it all went together in the end. When I removed the fitting in the block there was no filter in it anyway, so I don't know if the police removed it or Ford when I had it serviced. The Ford agent told me it had a replacement turbo fitted about 30,000km ago, so something went wrong, and maybe they removed the filter then. So thank you very much for this post, it was very clear, and I appreciate the trouble to which you went in order to post it. Many thanks.