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  1. B

    Oil ?

    Thank you all for your response's.
  2. B

    Oil ?

    ? type of oil for the new 2018 5.7 called two dealers. one said full synthetic, One said synthetic blend, and some manufacturer number I called said 5W-20. and never said anything about synthetic. she did say ApI, ms- 6395 but no one could tell me what the truck came with.
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