Well, the RVP of gas is made up of the combined RVP of all of its ingredients, which includes refined crude oil and a mix of different additives and compounds. There are two main reasons for the slightly higher cost of the summer blend of gas.
First, it has different ingredients than winter gas, and that can change the price. For example, butane is a big part of winter gas blends, and it happens to be inexpensive. But the summer blends have a lot less of it, replacing it with slightly more expensive additives that can bump up the overall cost of fuel in the summer.
The other reason for the higher cost of summer-blend gasoline is that refineries have to briefly shut down to transition from winter to summer blends. This typically occurs starting in April , allowing gas stations to start selling the summer blend by May or June. Winter gasoline varies widely in volatility throughout the season. Refiners constantly adjust their RVP to as high as 15 psi—higher than sea-level atmospheric pressure, which is The vapor pressure varies by month, region, and octane.
In frigid temperatures, higher-volatility fuel is essential and does not cause the smog effect it would in the summer. New Cars. Buyer's Guide. Type keyword s to search. Today's Top Stories. This content is created and maintained by a third party, and imported onto this page to help users provide their email addresses.
You may be able to find more information about this and similar content at piano. Advertisement - Continue Reading Below. More From News. Back to California's woes: First, an August fire at a Chevron refinery diminished the ability of the oil industry to meet demand, driving up delivery times and transportation costs.
That especially hurts in California, which has stricter standards than anywhere else in the nation as far as what blends it will sell, making the state especially vulnerable to supply issues. So Brown's loosening of the rules on gas blends is an attempt to fight back against that vulnerability and bring prices back down. But there's no guarantee. Gasoline is a commodity, and yet the price-setting system has only a loose relationship to supply and demand.
Rather than having an independent governing body oversee the supply side of the equation, suppliers voluntarily report on the supply of oil. And any time the numbers could be fudged for profit, we ought to raise our eyebrows. Type keyword s to search.
Today's Top Stories. This content is created and maintained by a third party, and imported onto this page to help users provide their email addresses. You may be able to find more information about this and similar content at piano. Advertisement - Continue Reading Below.
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