From posts gone by, Ford would only provide a warrenty on the engine if it had an oil change every 5000 miles, which is the official line.

However, as most cars now only have an annual or 15,000 mile schedule, it's a bit of a misnomer.

Personally, I use Vauxhall long life oil and change it every 5000 miles.

You pays your money and takes your chances.......