These posts got me to wondering how much the taxes varied from state to state.

Gasoline tax
(includes federal tax of 18.4/gal)

US (Volume-Weighted) Average 49.9

Alabama 39.3
Alaska 30.8
Arizona 37.4
Arkansas 40.2
California 71.3
Colorado 40.4
Connecticut 67.7
Delaware 41.4
District of Columbia 41.9
Florida 54.4
Georgia 45.9
Hawaii 66.5
Idaho 43.4
Illinois 57.5
Indiana 59.2
Iowa 40.4
Kansas 43.4
Kentucky 48.5
Louisiana 38.4
Maine 48.4
Maryland 45.4
Massachusetts 44.9
Michigan 37.4
Minnesota 47.0
Mississippi 36.8
Missouri 35.7
Montana 46.2
Nebraska 45.7
Nevada 51.6
New Hampshire 40.6
New Jersey 32.9
New Mexico 37.3
New York 68.3
North Carolina 56.2
North Dakota 41.4
Ohio 46.4
Oklahoma 35.4
Oregon 49.5
Pennsylvania 60.2
Rhode Island 51.4
South Carolina 35.2
South Dakota 40.4
Tennessee 39.8
Texas 38.4
Utah 42.9
Vermont 50.5
Virginia 35.7
Washington 55.9
West Virginia 54.1
Wisconsin 51.3
Wyoming 42.4