CASTROL EDGE With Syntec Power Technology SAE 5W-50 ensures: reduction of sludge and deposit formation; low evaporation; operation in a wide temperature range. Application. The motor oil CASTROL EDGE With Syntec Power Technology SAE 5W-50 is intended for use in gasoline and diesel automotive engines, it comprises the special set of additives based on Castrol SYNTEC Power technology. Approvals and specifications: ACEA A3/B3/B4; API SJ, API SL; BMW Longlife-01, MB 229.1, MB 229.3, VW/AUDI 502 00, VW/AUDI 505 00