April 5, 2012 - Quote:Question: Mobil 1 5W-20 and Chrysler MS-6395 Why is your Mobil 1 5W-20 not Chrysler MS-6395 spec approved? Or if it is, why is the certification not on the bottle or website? -- Josh Eads, Cabot, AR Answer: Chrysler’s latest revision to the MS-6395 specification calls for a field trial...