Phase 1 of this LCA project highlighted significant unresolved differences in allocation rules adopted by the partners in the ‘use phase’. Phase 2 updates the LCA guidelines, and achieves consensus for the algorithms adopted for both allocating absolute fuel use to a component, and the fuel reduction for a particular weight reduction. Further examination is made of end of life recycling scenarios, the sensitivity of inventory and assessment results to recycling credits, and a comparison of selected assessment methods. These are made within the context of a typical automotive comparative study. Some comments on the adoption of ‘quick’ LCA methods are also made.