I was at my dealer today and they have the Dexos2 oil on the top shelf completely separated from the Dexos1 oil on the bottom shelf.
Also the caps on the bottles are different colours.
Every stealership is different, while they do run on the same guidelines, let's just say a lot of things can be done under the table. After all it is a business, and when there is money involved, they will want to keep every penny. If you want to make sure they use Dexos, take it to a private mechanic, or do it yourself, and that way you can sure it is done. I will never trust my dealership on anything unless it is on paper and i can hold them against that little paper

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