Petroleum Price Information
Look Up Gas Stations Throughout the State - Worried about gas prices near you? Look up the average price for a specific city.
GasBuddy.com - Visual representation of average unleaded fuel prices by county.
AAA Fuel Gauge State Listing - Average gasoline prices for three grades of fuel and diesel indexed by state.
Annual Oil Market Chronology - Graph and explanation of oil prices by barrel since 1970.
Gasoline and diesel fuel - Energy Information Administration (EIA). Updated gasoline and diesel fuel information
Residential Heating Oil & Propane Prices - Michigan Agency for Energy. Prices are by region and state