Shell Helix Ultra is the FIRST motor oil made from natural gas. It uses PurePlus Technology, a revolutionary process that delivers crystal-clear base oil made from natural gas with virtually none of the impurities found in crude oil – making it 99.5% pure, based on paraffinic hydrocarbon content and significant higher level of iso-paraffins compared to typical Group II and III base oils. Shell Helix Ultra Professional AF 5W-30 for gasoline and diesel engines is approved against the technically challenging in-house Ford engine oil specification WSS-M2C913-C & WSS-M2C913-D. Also approved against the demanding Jaguar Land Rover engine oil specification STJLR.03.5003. Specifications, Approvals & Recommendations API SL ACEA A5/B5 Ford WSS-M2C913-C & WSS-M2C913-D Jaguar Land Rover STJLR.03.5003. The product specifications listed above may vary from time to time and may not all be available for sale in the United Kingdom. It is 100% synthetic motor oil, designed to meet the special requirements of manufacturers and the most demanding requirements of high performance engines, including Ford and those requiring ACEA A5/B5 specification. It offers fuel economy, passing ACEA M1-15 IFE fuel economy test (CEC-L-54-T-96) with a minimum fuel economy improvement of 3%. It provides increased durability and excellent wear protection, passing Ford's internal valve train wear tests, ball oxidation test (ASTM D6557) for engine oxide formation, and Sequence IVB (ASTM D8350) wear test for valve train wear. It ensures unsurpassed engine cleanliness, passing Sequence VH (ASTM D8256) sludge test for engine sludge and varnish, plus Sequence IVB (ASTM D8350) wear test for valve train wear. It also offers excellent carbon control, passing DV6C medium temperature dispersancy test (CEC L-106-16).