So I have been using Mobil 1 EP or Mobil Advanced Syn for 20 plus thousand miles with no issues. My question is: In my owners manual it specifically states use API Certified Oil with the Chrysler MS-6395 Spec. I don't see this rating on any Mobil bottle of syn. that I remember. I'm not at all concerned about the quality of the oil with or without the spec, what I'm concerned about is would I have warranty issues due to not running the correct spec oil Chrysler tells me too.
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