As pressures to improve air quality intensify, it is becoming harder for automakers to find new, affordable ways to improve fuel economy through established measures such as engine downsizing. Not yet high on the industry agenda but of growing importance, sustainability in fast-growing new markets must also be addressed. Continuing QUBE/just-auto's series of interviews, we spoke to Dr Oliver Taylor about a new approach to engine lubrication that could address both issues. Dr Taylor is chief engineer with Nexcel, an innovation business within BP's Castrol subsidiary.