Mobil 1Oao is the world's leading synthetic motor oil brand delivering our ultimate performance and protection. The Mobil 1 technology keeps your engine running like new. Mobil 1Oao FS x1 5W-50 is an advanced performance synthetic engine oil designed to help provide exceptional cleaning power. MobilOao industrial lubricants have a legacy of innovation and decades of proven performance, helping improve productivity and ensure you get the job done right.-a