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Discussion Starter · #1 ·
What is top tier diesel?
Is it a marketing thing?
 

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Yes.
 

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It's "supposed" to be good quality fuel. Only the top name brand fuel stations market the name Top Tier.
 

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Gas buddy had the top tier stations listed on their app, the ones that come to mind are exxon/mobil, shell, and valero that I can remember off hand. There was more company's.
 
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