Regular unleaded gasoline is motor gasoline with an 87 to 88 octane. Midgrade gasoline is motor gasoline with an 89 to 90 octane, which includes some octane boosters (this includes E–10 in Nebraska). Premium gasoline is motor gasoline with a 91 and higher octane.
Today's average state price and average metro prices for motor gasoline can be found in the Daily Fuel Gauge Report. Average monthly prices can also be viewed for the state and the following cities: Columbus, Kearney, Lincoln, Norfolk, North Platte, and Omaha.
Weekly average prices are also available.
A general rule of thumb: A dollar increase in the West Texas Intermediate (WTI) crude oil price per barrel will result in a 2.5–cent increase in the price of gasoline per gallon. Likewise, a dollar decrease in the WTI crude oil price per barrel will result in a 2.5–cent decrease in the price of gasoline per gallon.