Greenfield, IN
Loading prices
LiveUpdated Jun 3
Gas prices near 46140
Greenfield, IN · IN average $4.08/gal
Finding cheap gas in Greenfield (46140)
Greenfield is the Hancock County seat and the eastern edge of the Indianapolis metro, with the historic National Road (US Route 40) running straight through the center of town as Main Street. I-70 parallels it just to the north, with access at Exit 104, and that pairing of an interstate and an old US highway gives the town two distinct fueling zones.
Indiana's 2026 suspension of its gas sales tax and 36-cent excise tax has made the state the cheapest in the nation at the pump, and Greenfield drivers see it on every fill-up. Stations near the I-70 exit price for interstate and commuter traffic heading to Indianapolis, while those along Main Street serve more of the town itself.
Because Greenfield is a commuter town, many residents fuel on the way to or from the city. Checking a station at Exit 104 against one in the older core along US 40 is the simple way to find the day's lower number.
Nearby ZIP codes in Greenfield, IN
How to save more on gas in Greenfield
1. Use warehouse clubs
Costco and Sam’s Club typically price 15-25 cents per gallon below nearby stations. Membership pays for itself within a few fill-ups.
2. Fill up early in the week
Stations often raise prices Thursday for weekend demand. Fill up Monday through Wednesday to avoid the lift.
3. Keep tires properly inflated
Properly inflated tires improve fuel economy by up to 3 percent at current prices. Check pressure once a month.
4. Check back tomorrow
Prices can shift 10-20 cents overnight during volatile markets. A quick check before you leave home avoids paying yesterday’s spike.
5. Pay cash at split-pricing stations
Stations with cash and credit split pricing typically save an average of 10 cents per gallon when you pay cash.
Related guides
Deep-dives on US gas-price topics relevant to this area.
Brand
Sam's Club gas prices
Member-only fuel pricing at Sam's Club warehouse-club locations.
Research
Why gas prices rise faster than they fall
Asymmetric pass-through in US retail gasoline (rockets and feathers).
Research
When to buy gas: time-of-day and day-of-week patterns
Empirical patterns in retail pump pricing. Tue/Wed cheapest.
Directory
US gas station brands directory
Reference for 39 major US gas station chains.
About gas prices in Indiana
Indiana hosts the BP Whiting refinery on the Lake Michigan shore, which is the largest refinery in the Midwest at roughly 440,000 barrels per day and serves as the dominant supply source for Chicago, Northwest Indiana, and large parts of the Midwest. The state gas tax is around 33 cents per gallon when sales tax is layered on, slightly above the Midwest average. Costco, Sam's Club, Speedway (now part of 7-Eleven), and Murphy USA at Walmart locations are the most reliable for value across Indianapolis, Fort Wayne, and Evansville. Gary and Hammond often see the lowest pump prices statewide thanks to direct Whiting refinery supply.