Hi,
I came across a 5HP24 service manual recently and it states the lifetime oil does not need to be changed until it has been in use for ten years.
Hmmm so over 10 years a car could have done 10,000miles or 200,000miles.
I've emailed ZF about their recommendations. Both ZF uk and germany didn't bother replying. Thanks for that!
Anyway just thought I'd post what I'd read.
Linky.....
http://akpp-texpost.ru/5HP24E.pdf
John