2018 Hyundai Sonata EPA Fuel Economy Summary
The 2018 Hyundai Sonata delivers an EPA-certified 26–42 MPG combined (23–40 city / 32–46 highway depending on engine and drivetrain) across 7 configurations. Hybrid variants achieve up to 42 MPG combined, compared to 31 MPG for standard gasoline trims. Plug-in hybrid (PHEV) models offer up to 28 miles of all-electric range at 99 MPGe. Estimated annual fuel costs range from $1,450 to $2,350.
2018 Hyundai Sonata Powertrain & Efficiency Comparison
Factual efficiency differences across gasoline, hybrid, plug-in hybrid, and electric variants
Standard Gasoline Trims
Annual Fuel Cost: $2,000–$2,350 (4 configurations)
Hybrid (HEV) Trims
Annual Fuel Cost: $1,450–$1,500 (Saves ~$550/yr vs gas)
Plug-In Hybrid (PHEV)
Gasoline Combined: 39 MPG • Annual Energy Cost: $1,600
Official EPA Fuel Economy Ratings by Configuration (7 Variants)
Laboratory certification test values across engine, transmission, and drivetrain permutations
| Configuration / Model | Powertrain | Drivetrain | Transmission | City | Highway | Combined | EV Range | Annual Fuel Cost | CO2 (g/mi) |
|---|---|---|---|---|---|---|---|---|---|
| Sonata Hybrid SE Regular | 2L Hybrid | Front-Wheel Drive | Automatic (AM6) | 40 MPG | 46 MPG | 42 MPG | — | $1,450 | — |
| Sonata Hybrid Regular | 2L Hybrid | Front-Wheel Drive | Automatic (AM6) | 39 MPG | 44 MPG | 41 MPG | — | $1,500 | — |
| Sonata Plug-in Hybrid Regular Gas and Electricity | 2L Plug-in Hybrid | Front-Wheel Drive | Automatic (AM6) | 99 MPGe (37 MPG) | 100 MPGe (42 MPG) | 99 MPGe (39 MPG) | 28 mi | $1,600 | — |
| Sonata Regular | 1.6L 4-Cyl Gas | Front-Wheel Drive | Automatic (AM7) | 28 MPG | 37 MPG | 31 MPG | — | $2,000 | — |
| Sonata SE Regular | 2.4L 4-Cyl Gas | Front-Wheel Drive | Automatic (S6) | 25 MPG | 36 MPG | 29 MPG | — | $2,100 | — |
| Sonata Regular | 2.4L 4-Cyl Gas | Front-Wheel Drive | Automatic (S6) | 25 MPG | 35 MPG | 28 MPG | — | $2,200 | — |
| Sonata Regular | 2L 4-Cyl Gas | Front-Wheel Drive | Automatic (S8) | 23 MPG | 32 MPG | 26 MPG | — | $2,350 | — |
Deterministic Fuel Cost & Consumption Benchmarks
Standardized annual energy consumption and operating cost metrics based on 15,000 annual miles
Fuel Cost per 25 Miles
Based on $3.50 per gallon regular gasoline
Annual Fuel Consumption
Estimated annual energy units needed for 15,000 miles
5-Year Fuel Cost vs Avg Vehicle
Compared to the average new vehicle over 5 years
Fuel economy ratings, electric range figures, and energy cost estimates on this page are retrieved directly from the United States Environmental Protection Agency (EPA) and U.S. Department of Energy (FuelEconomy.gov) certified vehicle database.
Local Production Store Compiled: August 2026 • Deterministic Audited Dataset • Zero Dynamic External API Runtime Latency.