Growing octane needs widen the price difference between premium and regular gasoline">Growing octane needs widen the price difference between premium and regular gasoline
(Wed, 21 Jun 2017) The difference between U.S. average retail prices for premium and regular gasoline reached 50 cents per gallon in late 2016, and it has remained near that level so far in 2017. This price difference, or spread, has been generally increasing since 2000. Many factors on both the supply and demand sides are influencing this trend.
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