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The below regional chart refers to the 3 classes of E85 blends that are offered in a particular area at that time of year. Each class has different properties, the most important being the amount of Ethanol in the blend which can affect the Air/Fuel ratio of your customized tune if you've converted to E85. This chart represents the recommended fuel to retailers, not necessarily what's in the tank at your local station.

Please be sure to read our E85 Tuning article regarding how this plays a factor.
Summer Blend: Class 1 (min 79% ethanol)
Spring/Fall Blend: Class 2 (min 74% ethanol)
Winter Blend: Class 3 (min 70% ethanol)

State Fuel Region
Jan
Feb
Mar
Apr
May
Jun
Jul
Aug
Sep
Oct
Nov
Dec
Alabama  
2
2
2
2
2/1
1
1
1
1
1/2
2
2
Alaska Southern Region
3
3
3
3
3/2
2/1
1
1/2
2/3
3
3
3
Alaska South Mainland
3
3
3
3
3/2
2/1
1/2
2
2/3
3
3
3
Arizona North of 34 latitude
3
3
3
3/2
2
2/1
1
1
1/2
2/3
3
3
Arizona South of 34 latitude
2
2
2
2/1
1
1
1
1
1
1/2
2
2
Arkansas  
3
3
3/2
2/1
1
1
1
1
1/2
2
2/3
3
California North Coast
2
2
2
2
2
2/1
1
1
1
1/2
2
2
California South Coast
2
2
2
2
2/1
1
1
1
1
1/2
2
2
California Southeast
3
3/2
2
2
2/1
1
1
1
1/2
2
2/3
3
California Interior
2
2
2
2
2
2/1
1
1
1
1/2
2
2
Colorado East of 105 longitude
3
3
3
3/2
2
2/1
1
1
1/2
2/3
3
3
Colorado West of 105 longitude
3
3
3
3
3/2
2
2/1
1/2
2/3
3
3
3
Connecticut  
3
3
3
3/2
2
2/1
1
1
1/2
2
2/3
3
Delaware  
3
3
3/2
2
2/1
1
1
1
1/2
2
2/3
3
DC  
3
3
3/2
2
2/1
1
1
1
1/2
2
2/3
3
Florida North of 29 latitude
2
2
2
2/1
1
1
1
1
1
1/2
2
2
Florida South of 29 latitude
2
2
1
1
1
1
1
1
1
1
1/2
2
Georgia  
3
3
2
2/1
1
1
1
1
1
1/2
2
2/3
Hawaii  
1
1
1
1
1
1
1
1
1
1
1
1
Idaho  
3
3
3
3/2
2
2
2/1
1/2
2
2/3
3
3
Illinois North of 40 latitude
3
3
3
3/2
2
2/1
1
1
1/2
2/3
3
3
Illinois South of 40 latitude
3
3
3
3/2
2/1
1
1
1
1/2
2/3
3
3
Indiana  
3
3
3
3/2
2/1
1
1
1
1/2
2/3
3
3
Iowa  
3
3
3
3/2
2
2/1
1
1
1/2
2/3
3
3
Kansas  
3
3
3
3/2
2
2/1
1
1
1/2
2/3
3
3
Kentucky  
3
3
3/2
2
2/1
1
1
1
1/2
2
2/3
3
Louisiana  
2
2
2
2/1
1
1
1
1
1
1/2
2
2
Maine  
3
3
3
3/2
2
2/1
1
1/2
2
2/3
3
3
Maryland  
3
3
3/2
2
2/1
1
1
1
1/2
2
2/3
3
Massachusetts  
3
3
3
3/2
2
2/1
1
1
1/2
2
2/3
3
Michigan Lower Peninsula
3
3
3
3/2
2
2/1
1
1/2
2
2/3
3
3
Michigan Upper Peninsula
3
3
3
3
3/2
2/1
1
1/2
2
2/3
3
3
Minnesota  
3
3
3
3
3/2
2/1
1
1/2
2
2/3
3
3
Mississippi  
2
2
2
2/1
1
1
1
1
1
1/2
2
2
Missouri  
3
3
3
3/2
2/1
1
1
1
1/2
2/3
3
3
Montana  
3
3
3
3
3/2
2
2/1
1/2
2/3
3
3
3
Nebraska  
3
3
3
3/2
2
2/1
1
1/2
2
2/3
3
3
Nevada North of 38 latitude
3
3
3
3/2
2
2
2/1
1/2
2
2/3
3
3
Nevada South of 38 latitude
3
3
3/2
2
2/1
1
1
1
1/2
2
2/3
3
New Hampshire
3
3
3
3/2
2
2/1
1
1/2
2
2/3
3
3
New Jersey  
3
3
3/2
2
2/1
1
1
1
1/2
2
2/3
3
New Mexico North of 34 latitude
3
3
3
3/2
2
2/1
1
1
1/2
2/3
3
3
New Mexico South of 34 latitude
3
3
3/2
2/1
1
1
1
1
1
1/2
2/3
3
New York North of 42 latitude
3
3
3
3/2
2
2/1
1
1/2
2
2/3
3
3
New York South of 42 latitude
3
3
3
3/2
2/1
1
1
1
1/2
2
2/3
3
North Carolina  
3
3
3/2
2
2/1
1
1
1
1/2
2/3
3
3
North Dakota  
3
3
3
3
3/2
2/1
1
1/2
2
2/3
3
3
Ohio  
3
3
3
3/2
2/1
1
1
1
1/2
2/3
3
3
Oklahoma  
3
3
3
3/2
2/1
1
1
1
1/2
2
2/3
3
Oregon East of 122 longitude
3
3
3
3/2
2
2
2/1
1/2
2
2/3
3
3
Oregon West of 122 longitude
3
3/2
2
2
2
2/1
1
1
1/2
2
2
2/3
Pennsylvania North of 41 latitude
3
3
3
3/2
2
2/1
1
1/2
2
2/3
3
3
Pennsylvania South of 41 latitude
3
3
3
3/2
2
2/1
1
1
1/2
2
2/3
3
Rhode Island  
3
3
3
3/2
2/1
1
1
1
1/2
2
2/3
3
South Carolina  
2
2
2
2/1
1
1
1
1
1
1/2
2
2
South Dakota  
3
3
3
3/2
2
2/1
1
1/2
2
2/3
3
3
Tennessee  
3
3
3/2
2
2/1
1
1
1
1/2
2
2/3
3
Texas North of 31 latitude
3
3
3/2
2
2/1
1
1
1
1/2
2
2/3
3
Texas South of 31 latitude
2
2
2
2/1
1
1
1
1
1
1/2
2
2
Utah  
3
3
3
3/2
2
2/1
1
1
1/2
2/3
3
3
Vermont  
3
3
3
3/2
2
2/1
1
1/2
2
2/3
3
3
Virginia  
3
3
3/2
2
2/1
1
1
1
1/2
2
2/3
3
Washington East of 122 longitude
3
3
3/2
2
2
2/1
1
1
1/2
2/3
3
3
Washington West of 122 longitude
3
3/2
2
2
2
2/1
1
1
1/2
2
2
2/3
West Virginia  
3
3
3
3/2
2
2/1
1
1/2
2
2/3
3
3
Wisconsin  
3
3
3
3/2
2
2/1
1
1/2
2
2/3
3
3
Wyoming  
3
3
3
3
3/2
2
2/1
1/2
2
2/3
3
3

Information Source: U.S. Dept of Energy, Handbook for Handling, Storing, and Dispensing E85.