Top 3 Gas Stations & Cheap Fuel Prices in Sweet Grass County, MT

closed for a week 5-10-21

Easy in and out with a big rig.

Regular unleaded at The Fort is 85 octane. Not good for any vehicles rated 87 or higher. Cheaper at ExxonMobil or Conoco and regular starts at 87 octane over at those locations. Great selection of goods at The Fort with good customer service but avoid their regular unleaded fuel (85 octane) as regular use will kill your engine. Not worth filling up with it there.