Oilman - great to see you on here. I don't know why it has taken me 2 weeks to find your thread (I didn't think you were here). You have been a source of great info for me for at least the last 8 years, on many different forums for my cars.
Anyway - I have recently bought a Mk3 GTi 8V with 90k miles. I have no idea if the last service in the book is real, I suspect not by the rusty filter and mild coke build up in the breather hose. I am assuming it has been 25k since the last oil change and a good build up of carbon has occurred.
Knowing that an oil flush product is not recommended, what oil should I use to get a maximum cleaning effect and how long should I run it before I drop that out and put a decent 5-40 synthetic in? Should I budget for more than one cycle?
Cheers.
Jim