EPA ratings · 2018 · BMW · 4 Series
2018 BMW 4 Series Fuel Economy
EPA rates the 2018 BMW 4 Series's 15 trims from 23 to 27 MPG combined, 440i Coupe to 430i Convertible. The table below prices every trim per mile at a fuel price and mileage you can change.
EPA ratings by trim
| Trim | Engine | Transmission | Drive | City | Hwy | Combined |
|---|---|---|---|---|---|---|
| 430i Convertible · Premium | 2 L, 4 cyl | Automatic (S8) | Rear-Wheel Drive | 24 | 34 | 27 MPG |
| 430i Coupe · Premium | 2 L, 4 cyl | Automatic (S8) | Rear-Wheel Drive | 24 | 34 | 27 MPG |
| 430i Coupe · Premium | 2 L, 4 cyl | Manual 6-spd | Rear-Wheel Drive | 21 | 33 | 25 MPG |
| 430i Gran Coupe · Premium | 2 L, 4 cyl | Automatic (S8) | Rear-Wheel Drive | 24 | 34 | 27 MPG |
| 430i xDrive Convertible · Premium | 2 L, 4 cyl | Automatic (S8) | All-Wheel Drive | 22 | 32 | 26 MPG |
| 430i xDrive Coupe · Premium | 2 L, 4 cyl | Automatic (S8) | All-Wheel Drive | 23 | 33 | 27 MPG |
| 430i xDrive Gran Coupe · Premium | 2 L, 4 cyl | Automatic (S8) | All-Wheel Drive | 23 | 33 | 27 MPG |
| 440i Convertible · Premium | 3 L, 6 cyl | Automatic (S8) | Rear-Wheel Drive | 21 | 29 | 24 MPG |
| 440i Coupe · Premium | 3 L, 6 cyl | Automatic (S8) | Rear-Wheel Drive | 21 | 32 | 25 MPG |
| 440i Coupe · Premium | 3 L, 6 cyl | Manual 6-spd | Rear-Wheel Drive | 19 | 29 | 23 MPG |
| 440i Gran Coupe · Premium | 3 L, 6 cyl | Automatic (S8) | Rear-Wheel Drive | 21 | 32 | 25 MPG |
| 440i xDrive Convertible · Premium | 3 L, 6 cyl | Automatic (S8) | All-Wheel Drive | 20 | 29 | 23 MPG |
| 440i xDrive Coupe · Premium | 3 L, 6 cyl | Automatic (S8) | All-Wheel Drive | 21 | 31 | 25 MPG |
| 440i xDrive Coupe · Premium | 3 L, 6 cyl | Manual 6-spd | All-Wheel Drive | 19 | 29 | 23 MPG |
| 440i xDrive Gran Coupe · Premium | 3 L, 6 cyl | Automatic (S8) | All-Wheel Drive | 21 | 31 | 25 MPG |
City and highway are EPA's adjusted label figures; combined is the 55/45 blend printed on the window sticker. For electric and plug-in trims the MPG columns are MPGe, and the kWh per 100 miles is the figure a charging cost actually turns on; EPA measures it at the wall, so charging losses are already in it. Unrounded combined figures, where EPA publishes them: 430i Convertible 27.3913; 430i Coupe 27.3913; 430i Coupe 25.3157; 430i Gran Coupe 27.3913; 430i xDrive Convertible 25.7992; 430i xDrive Coupe 26.5895; 430i xDrive Gran Coupe 26.5895; 440i Convertible 23.8187; 440i Coupe 25.1836; 440i Coupe 22.7738; 440i Gran Coupe 25.1836; 440i xDrive Convertible 23.1926; 440i xDrive Coupe 24.8238; 440i xDrive Coupe 22.6479; 440i xDrive Gran Coupe 24.8238.
What the rating costs per mile
The rating divided by a price, times your miles. It starts at EIA's current U.S. averages and EPA's 15,000 miles so the right-hand column is comparable; type your own pump price, home rate and mileage over them.
| Trim | Runs on | Rated | Per mile | Per year | EPA's figure |
|---|---|---|---|---|---|
| 430i Convertible | Premium Gasoline | 27 MPG | 15.9¢ | $2,380 | $3,050 |
| 430i Coupe | Premium Gasoline | 27 MPG | 15.9¢ | $2,380 | $3,050 |
| 430i Coupe | Premium Gasoline | 25 MPG | 17.1¢ | $2,570 | $3,300 |
| 430i Gran Coupe | Premium Gasoline | 27 MPG | 15.9¢ | $2,380 | $3,050 |
| 430i xDrive Convertible | Premium Gasoline | 26 MPG | 16.5¢ | $2,472 | $3,150 |
| 430i xDrive Coupe | Premium Gasoline | 27 MPG | 15.9¢ | $2,380 | $3,050 |
| 430i xDrive Gran Coupe | Premium Gasoline | 27 MPG | 15.9¢ | $2,380 | $3,050 |
| 440i Convertible | Premium Gasoline | 24 MPG | 17.8¢ | $2,678 | $3,400 |
| 440i Coupe | Premium Gasoline | 25 MPG | 17.1¢ | $2,570 | $3,300 |
| 440i Coupe | Premium Gasoline | 23 MPG | 18.6¢ | $2,794 | $3,550 |
| 440i Gran Coupe | Premium Gasoline | 25 MPG | 17.1¢ | $2,570 | $3,300 |
| 440i xDrive Convertible | Premium Gasoline | 23 MPG | 18.6¢ | $2,794 | $3,550 |
| 440i xDrive Coupe | Premium Gasoline | 25 MPG | 17.1¢ | $2,570 | $3,300 |
| 440i xDrive Coupe | Premium Gasoline | 23 MPG | 18.6¢ | $2,794 | $3,550 |
| 440i xDrive Gran Coupe | Premium Gasoline | 25 MPG | 17.1¢ | $2,570 | $3,300 |
Per mile = price ÷ rated MPG (gasoline) or price per kWh × kWh per 100 miles ÷ 100 (electricity). Per year = per mile × miles. EPA's figure is its own annual fuel cost at 15,000 miles, 55% city, and the national price in force when the file was built; it will differ from the middle columns whenever the price here differs. A plug-in hybrid is shown once on each fuel; its real cost sits between them, by how much of its driving is on the battery.
Fuel only — before depreciation, insurance, maintenance or tires, which the True Cost per Mile Calculator adds. Most drivers land below the rating; the True MPG Calculator measures your own from two fill-ups.
EPA's own figures, and why they differ
The “EPA's figure” column is EPA's annual fuel cost from the same file: 15,000 miles, 55% city, and the national fuel price fueleconomy.gov was using on the day the file was built (2026-09-29). fueleconomy.gov recomputes its page every week at the current price, so its number and the file's drift apart between file dates; the middle columns here use a price you can see and change, which is the only honest way to compare two cars. EPA also prints a five-year “you save/spend” against the average new vehicle (spends $3,250 for the 430i Convertible); it rests on the same assumptions and is not repeated here as a result.
Every figure on this page is a rating, not a measurement of any particular car. The site never calls a rating wrong; it shows what your own price and miles do to it. See the model on fueleconomy.gov.
Other model years of the BMW 4 Series: 2027, 2026, 2025, 2024, 2023, 2022, 2021, 2020, 2019, 2017, 2016, 2015, 2014.
Related tools
Price the same miles on gasoline and on electricity, using your fuel price, your utility rate, and each car's rated efficiency.
Open tool →True MPG CalculatorYour car's real fuel economy from two odometer readings and a fill-up — and how far it falls from its EPA rating.
Open tool →Commute Cost CalculatorWhat getting to work costs per day, per month, and per year — energy only, or all-in at the IRS standard mileage rate.
Open tool →Gas Prices by Region and StateThis week's average price of regular gasoline for the U.S., every state and ten cities, from EIA's weekly survey — a dated figure to start from, never one assumed for you.
Open tool →Electricity Prices by StateThe average residential price of electricity in every state, by month, from EIA's utility filings — and what each rate does to a mile in an electric car.
Open tool →Informational only — published averages for scale and comparison, not a quote for any pump, utility or vehicle. Your own price is the one that counts, and every calculator on this site takes it as an input.
Ratings: U.S. EPA and U.S. DOE, fueleconomy.gov vehicles.csv dated 2026-09-29 (EPA record ids 38600, 38612, 38613, 38615, 38601, 38614, 38616, 38602, 38617, 39141, 38620, 38603, 38618, 38619, 38621). Prices: EIA, U.S. regular gasoline week of October 19, 2026; U.S. residential electricity August 2026. Snapshots refreshed monthly.