The 2018 Kia Optima Plug-in Hybrid gets 40 MPG combined, making it a good choice for the family sedan buyer looking to save money. This efficiency results in significantly reduced fuel costs and a smaller carbon footprint, all while retaining the practicality and comfort of a mid-size sedan. This vehicle suits the customer who wants to try electrification without the range anxiety of a full EV, and who values proven reliability over the latest tech. They accept its fuel economy because it balances lower fuel costs and everyday usability.

City and highway performance

The EPA breaks down the Optima Plug-in Hybrid’s fuel economy, revealing 38 MPG in the city and 43 MPG on the highway. The city figure reflects stop-and-go driving, where the electric motor can handle more of the workload. This boosts efficiency compared to a conventional gasoline engine. The strong highway number shows how well the aerodynamic design and efficient Atkinson-cycle engine perform at sustained speeds. These figures suggest the Optima Plug-in Hybrid performs well in both urban and suburban environments, making it a versatile choice for commutes and driving styles.

Annual fuel cost

The EPA estimates the annual fuel cost for the 2018 Kia Optima Plug-in Hybrid at $1,100. This is based on 15,000 miles of driving per year, using national average fuel prices when tested. Individual fuel costs will vary depending on local gas prices and your driving habits. However, this $1,100 estimate provides a benchmark, letting prospective buyers understand potential savings compared to a traditional gasoline-powered car or a less fuel-efficient hybrid.

Real-world expectations

EPA ratings are a helpful guide to compare all Kia fuel economy data, but real-world MPG will differ slightly. Driving style, terrain, weather, and tire pressure can impact fuel consumption. However, given the Optima Plug-in Hybrid’s powertrain, drivers can expect to achieve figures close to the EPA estimates in typical conditions. Charging the battery regularly will improve fuel economy, potentially reducing gas station visits. Drivers who maintain their car well, and drive to conserve fuel, will save even more.

How it compares

The 2018 Kia Optima Plug-in Hybrid performs well compared to other plug-in hybrid sedans of its time. The Hyundai Sonata Plug-in Hybrid, sharing many components with the Optima, achieves similar EPA ratings, around 39 MPG combined. The Chevrolet Volt, a hatchback with more all-electric range, posts higher MPGe (miles per gallon equivalent) figures, but the Volt relies more on electric power. The Toyota Prius Prime achieves higher MPG numbers, around 54 MPG combined. However, the Optima Plug-in Hybrid offers a larger cabin and a more traditional sedan experience, important for some buyers. Across all years, the OPTIMA MPG across all years and trims is something to consider.

Tips to maximize efficiency

Take advantage of regenerative braking. The Optima Plug-in Hybrid has a regenerative braking system that captures energy during deceleration and recharges the battery. By anticipating stops and gently applying the brakes, you can recover more energy, extending your electric driving range and improving gas mileage.

Precondition the cabin while plugged in. Heating or cooling the cabin uses considerable energy. By preconditioning while the car is plugged in, you can draw power from the grid rather than the battery, preserving the battery’s charge for driving.

Optimize your driving style. Avoid aggressive acceleration and hard braking, as these use more energy. Maintaining a steady speed and anticipating traffic flow can improve fuel economy. Use cruise control on the highway to maintain a consistent speed and reduce fuel consumption.

Keep your tires properly inflated. Underinflated tires increase rolling resistance, which hurts fuel economy. Check your tire pressure regularly and inflate them to the manufacturer’s recommended levels, found on a sticker inside the driver’s side doorjamb.