Fully synthetic engine oil recommended for cars and light duty commercial vehicles, where a fuel efficient engine oil is prescribed according to ACEA C1, such as Ford engines requiring Ford M2C-934A or 934B, as well as Mazda and Volvo engines where a ‘low saps’ engine oil is prescribed. This oil is also suited to Euro-4 cars to prevent soot filter clogging. The oil has low levels of sulfated ash, phosphorus and sulfur, while maintaining additional fuel economy properties.