Mobil 1 filters?

[Phil Payne]

> I just bought an UrS4 and the Mann filter called for it is a Mann W719/30,
> which has been designed for long life and synthetic oils.   The filter
> called for the Type 44 is the W719/5, however, the W719/30 is an exact fit.

Lots of filters 'fit'.  Does it have a one-way valve - that's the key issue with the hydraulic
tappet engines?

--
  Phil Payne
  http://www.isham-research.com/quattro
  +44 7785 302 803
  +49 173 6242039