The ACEA A5/B5 oil specification is for conventional and low-viscosity oils suitable for petrol and diesel engines. A reduction in fuel consumption of at least 2.5% compared to a 15W-40 viscosity oil must be demonstrated in a test engine for an oil to meet this specification. Extended oil drain intervals possible. Consult your owners manual or use our online oil service pack recommendation to see if this specification of oil is suitable for your vehicle.