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Not here to rain on anybody’s parade. However, I was employed by a large oil company in both the petroleum and chemical divisions. The additives you read about are predominantly little more than expensive marketing campaigns. Yes, the majors have patented specific names for their additives/blends but take it from an insider, the 91 (or 93) gasolines you buy daily are more alike than different. YMMV (mileage-I made a funny)
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