25 MPG combined might not sound exceptional, but for the 2017 Kia Optima 2.0L 4-cylinder, it is a reasonable choice. This isn’t a hyper-efficient hybrid, and it doesn’t try to be. The Optima in this form is for buyers who want a comfortable, stylish, and well-equipped mid-size sedan at an accessible price. Fuel economy is a consideration, but not the *primary* deciding factor. People who buy this car are often commuters, small families, or individuals who appreciate a well-rounded vehicle with a strong warranty and plenty of features. They are willing to trade some fuel savings for more interior space and power than base models offer.

City and highway performance

The EPA estimates for the 2017 Optima 2.0L reflect how it drives in the real world. Its 22 MPG city rating shows the engine’s responsiveness and the six-speed automatic transmission’s smooth shifts. This combination allows confident acceleration from stoplights and easy maneuvering in urban environments. The 31 MPG highway rating suggests comfortable and relatively efficient long-distance cruising. The Optima’s well-tuned suspension and comfortable seats make highway driving better. These ratings are achievable with careful driving. Hard acceleration or consistently exceeding posted speed limits will lower that number, as with any vehicle.

Annual fuel cost

The EPA estimates the annual fuel cost for the 2017 Kia Optima 2.0L at $1,750. This is based on driving 15,000 miles per year, using the EPA’s estimate of average national fuel prices. Individual fuel costs will vary based on driving habits, local fuel prices, the grade of gasoline purchased, and vehicle maintenance. This $1,750 figure is a standard to compare against other vehicles. To see all Kia fuel economy data, check out our detailed brand page.

Real-world expectations

The EPA provides a useful baseline, but real-world fuel economy changes. Expect numbers closer to the combined 25 MPG rating in mixed driving. To get the EPA’s 31 MPG highway number, you need consistent speeds, minimal hard acceleration, and proper tire inflation. Short trips, heavy traffic, and aggressive driving will hurt fuel economy, potentially dropping below the 22 MPG city estimate. Owner forums show that many drivers get consistent results within a few MPG, meaning this powertrain is predictable.

How it compares

The fuel economy of the 2017 Kia Optima 2.0L 4-cylinder puts it in the mid-size sedan group. A 2017 Toyota Camry with its 2.5L 4-cylinder engine gets an EPA-estimated 24 MPG combined. The Honda Accord, particularly the LX and Sport trims with the 2.4L 4-cylinder, has ratings around 27 MPG combined. A Mazda6 with its Skyactiv-G 2.5L engine is around 28 MPG combined. This is important because consumers shopping for a mid-size sedan are likely comparing these vehicles, looking at fuel economy, features, price, and reliability. To explore OPTIMA MPG across all years, see our OPTIMA MPG across all years page.

Tips to maximize efficiency

Keep consistent tire pressure, as specified on the tire placard, usually on the driver’s side doorjamb. Underinflated tires create more rolling resistance, making the engine work harder and consume more fuel. Check tire pressure regularly, especially when the temperature changes. Correct inflation also helps handling and makes tires last longer.

Avoid aggressive acceleration and braking. The Optima 2.0L is not a sports car. Smooth, gradual acceleration and watching traffic can improve fuel economy. The engine control unit (ECU) will add more fuel when it thinks performance is needed. Look ahead, maintain a consistent speed, and use the brakes less.

Reduce aerodynamic drag by removing unnecessary items from the roof or trunk that can create wind resistance. Even small items like roof racks or bike carriers can hurt fuel economy, at highway speeds. Keeping windows closed at higher speeds also reduces drag.

Use cruise control on the highway when you can. Keeping a consistent speed removes the changes that come from manual throttle control, leading to more efficient fuel use. Be aware of traffic and don’t use cruise control on hills, as the transmission may downshift often.

Make sure the vehicle is maintained. Regular oil changes following the manufacturer’s intervals keep the engine running smoothly. A clean air filter allows the right airflow, preventing the engine from working harder. Replacing spark plugs at the recommended intervals also ensures efficient combustion.