Missouri Guidelines For Blending Flex Fuels Pilot Program

Missouri Department of Agriculture Requirements


The blending of fuels with ethanol percentages between 10 percent and 85 percent will be conditionally permitted on a trial basis for 1 year and after one year, will be reviewed by the Department of Agriculture for permanent status.  Potential individuals must request permission in writing prior to installation or operations of any blending equipment. However, the pilot program will be limited to those stations that will best demonstrate the feasibility of the use of blender pumps. During this period the Missouri Department of Agriculture will monitor the equipment used to dispense the ethanol blends to ascertain that the equipment is suitable and is capable of producing an accurate measurement.  Since there are no ASTM standards for evaluating the quality of the product, we will take fuel samples to ascertain that the correct blend ratios are being dispensed and follow the development of standards.  Provided that no negative trends are observed during the trial period and fuel standards have been developed or work continues on developing them, we will consider moving toward a permanent standard for all Missouri retailers.


During this pilot program the following requirements must be met:

Note – this guide is intended for making blends from storage tanks containing regular unleaded gasoline (E0) or E10 and fuel ethanol (E98-E95) or E85.


1.  Suitability of equipment.

a. Device must have NTEP certificate and comply with the applicable provisions of it including flow rates.

b. Blending and dispensing system must be fully compatible for flex fuels.

d. Dispensing and associated equipment must comply with all applicable requirements of NIST Handbook 44


2.  Labeling of dispenser and Storage Tanks.

a. E10 and unleaded 87 must be labeled with octane rating (yellow background).

b. Flex fuels E20, E30, E85 are prohibited from displaying an octane rating.

c. Flex fuel blends must be labeled with “orange” labels (same size and type required by FTC).

d. Storage tanks must be properly identified as to the fuel contained in the tank.  Although under current rules and regulations, color coding is permissible, it is highly recommended that storage tanks be permanently identified to minimize the risk of putting E95 in the wrong storage tank.

e. No advertising or labeling will be permitted that would encourage or suggest the use of blends in non-flexible fuel vehicles.

f. Must abide with all U. S. EPA regulations and federal laws.

g. All blender pump dispenser nozzle handles dispensing blends greater than 10% ethanol shall be yellow in color. All other product handles shall not be yellow in color.

h. A label which states, “Stop – Not Gasoline” shall be placed on the dispenser nozzle handle or adjacent to the nozzle rest.

i. Must provide a label on each dispenser panel suggested by U. S. EPA in lettering size ¼ inch minimum height block style letters:



Using this fuel in any vehicle or engine that is not flexible fuel vehicle or engine may damage the vehicle or engine and void its warranty.

Federal Law Prohibits the use of gasoline containing more than 10 percent ethanol in any motor vehicle or non-road engine that is subject to U. S. EPA regulations, other than flexible-fueled vehicles and engines.


3.  Proper dispensing of fuels.

a. Fuel ethanol (E98-E95) shall only be used as a blend stock with gasoline or E10. It shall not be offered as a fuel itself.

b. Flexible Fuel that is greater than 10% ethanol shall be dispensed from a hose separate from the E10 or unleaded gasoline.

c. All dispensers must be accurate and the blend ratios correctly dispensed.

d. U. S. EPA recommends marketers take voluntary precautions to restrict access to pumps that dispense ethanol blends greater than E10 to those persons who have flexible-fueled vehicles or engines. Such voluntary precautions may include card locks systems or locating dispensers away from pumps dispensing fuel for gasoline-only vehicles or engines.


4.  Ethanol Issues.

a. Flex fuel dispensers must be equipped with an ethanol rated filter (10 micron).

b. Storage tanks and lines used to store fuel ethanol must be cleaned prior to start up.


5.  Fuel Quality Standards.

a. Unleaded 87 octane must meet ASTM standards, D4814.

b. E10 must meet ASTM D4814 or Missouri Regulations 2 CSR 90-30.040

c. E85 must meet ASTM standards, D5798 (seasonal blend ratio adjustments will be required when fuel ethanol is used as the blend stock).          

d. Fuel ethanol must meet ASTM D4806.

e. E20, E30 or other blends will be monitored for percent of blends (a blend guide can be provided by MDA).


6.  Inspections

a. An initial inspection, including fuel quality will be conducted prior to the station opening for business.

b. Periodic inspections will be conducted to monitor the equipment’s performance and fuel quality.

c. Provisions must be made available for state inspectors to easily obtain samples from storage tanks of blendstock products (low and high ethanol products).

d. Provisions must be made available for disposing of blended products as the blended products cannot be returned to storage tanks.



Missouri Department of Agriculture

Division of Weight and Measures

PO Box 630

Jefferson City, Missouri 65102-0630



Fuel Quality Program



Fuel Device/Safety Program






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