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Politics : Rat's Nest - Chronicles of Collapse

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To: Wharf Rat who wrote (5624)3/16/2007 4:16:56 PM
From: Wharf Rat  Read Replies (1) of 24225
 
Refining 101: Summer Gasoline
Posted by Robert Rapier on March 16, 2007 - 11:00am
Topic: Supply/Production
Tags: ethanol, gasoline blending, refining, summer gasoline

Just what is summer gasoline? Twice a year, in the fall and in the spring, you hear about the seasonal gasoline transition. However, most people probably don’t understand what this actually means. AAA recently provided a Top 10 list explaining the recent rise in gasoline prices, and summer gasoline checked in at #7:

7. The summer blend switchover. This transition from winter-blend to summer-blend fuel, a concoction that causes less smog, occurs every spring. It causes a dip in gasoline supplies as refineries in the U.S. shut down temporarily to retool their production facilities.
That's only partially correct, and is probably the extent of most people's understanding of this transition. But given that I am very keen that people should understand the energy industry, it is worth a review, and a layman's explanation. I explained the details behind this transition in Here Comes Winter Gasoline. But let’s review some concepts.
theoildrum.com
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