CHALLENGES FACED 1. Arriva buses sought to reduce oil consumption in their fleet of passenger buses. Four oil changes a year took the vehicles out of service too often and increased oil costs. 2. Even though mass transport is intrinsically more environmentally-friendly than personal vehicles, Arriva was keen to promote an even greener image of itself. SOLUTIONS DELIVERED 1. By fitting an Extended Oil Life System, IPU was able to show tha

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