LOCOMOTIVE 5W-30 A5/B5 is a full synthetic super high performance engine oil which meets the ACEA A5/B5 specifications. It combines the latest developments in oil formulation and additive technology to provide a lubricating oil with the highest level of protection, whilst promoting fuel efficiency and lowering emissions in modern low friction engines. It meets the API SP performance level which has been specifically developed to address Low-Speed Pre-Ignition (LSPI) and timing chain wear in small turbocharged petrol engines.