A method and apparatus is disclosed for determining pressure provided by a pump of a topical negative pressure system. The semiconductor has the driving circuit and the pixel portion on the same substrate. The MiM encapsulations use provider network MAC addresses which enables VPLS MAC learning to occur using provider network MAC address space. Moreover, the use of the friction modifier in combination with a detergent package permits increased fuel efficiency to be obtained without increasing the incidence of IVD deposits in combustion engines running on a fuel modified with the additive concentrate.