my 20V T is just about to click 130k miles and still runs perfect and pulls smooth and stronge. when i bought it it had a service history up untill 100k but nothing for almost three years!!! first thing i did was a timing belt and water pump, just as well as the old one was in 2 bits! the engine was very sludge so i done an oil change and ran it on v power for a month and drove it hard, had a few idle issues but i think it may have been down to a dirty lanbda sensor and just genrally the engine being crapped up from never been drivin hard. i just done another oil change with some high quality lucas oil and it as smooth as a car with half the millage, and still keeps up with the rest of the cars on the road. so i wouldnt worry about big millage, just look after it in its old age with good oil and regular changes and i dont think you will have any trouble.