Look, Louisiana
REQUIRES a label when ethanol is present in gasoline in percentages greater than 1%. No label, no ethanol. Unless that law has changed (possible), then the stations I'm using aren't using E-blend gas. Many states require a label at the pump. In Louisiana, one reason the labels were required is that E10 starts to will dissolve the resin in some fiberglass tanks, like those you might see on an older boat.
EDIT: From an executive order, December 2008
Quote:
Petroleum Products and Motor Fuels
(LAC 7:XXXV.Chapter 3)
In accordance with the Administrative Procedures Act, R.S. 49:950 et seq., and R.S. 3:4608 and 3:4680, the Commissioner of Agriculture and Forestry, amends regulations to place regulations regarding motor fuels within the chapter dealing with petroleum products; to redefine biodiesel to coincide with the definition of biodiesel that is in federal and state law; to define what is a biodiesel blend; to make technical changes; and to adopt regulation governing labeling of dispensers from which diesel, biodiesel and gasoline-ethanol blends of motor fuel are sold.
It is essential that wholesalers, retailers, and consumers of motor vehicle fuels are made aware of the type of motor fuel that is being received and whether the motor fuel is blended with biodiesel, ethanol, or other types of motor fuels. The proper labeling of dispensers of diesel, biodiesel and gasoline-ethanol blends of motor fuel allow purchasers and consumers of these motor fuels to be aware of the nature of the motor fuel that is being purchased or consumed, so that they may make an informed decision as to whether they want to purchase or use the motor fuel. These regulations provide for the labeling of motor fuel dispensers to achieve this purpose.
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