The 2020 Kia K900 gets 21 MPG combined. It’s a full-size luxury sedan offering comfortable features and technology. The K900 is designed for buyers who want space, premium features, and a smooth ride more than ultimate fuel efficiency.

City and highway performance

The EPA estimates the K900 gets 18 MPG in the city and 25 MPG on the highway. These numbers reflect that this is a vehicle designed for a refined driving experience. The 3.3L V6 provides power for cruising and acceleration, but isn’t designed for maximum efficiency. The eight-speed automatic transmission is smooth and responsive, designed for gear changes rather than optimized fuel conservation. The weight of the vehicle, needed for its solid feel and many features, also affects fuel consumption. These numbers reflect the cost for a full-size luxury experience.

Annual fuel cost

The EPA estimates the annual fuel cost for the 2020 Kia K900 at $2,750. This is based on driving 15,000 miles per year and using national average fuel prices. This is just an estimate, and your actual fuel costs may change based on your driving, local fuel prices, and the type of driving you do. Be sure to consider this with other expenses, like insurance, maintenance, and repairs. K900 buyers usually include these costs in their budget for a premium car.

Real-world expectations

EPA estimates provide a benchmark, but real-world fuel economy can change. Drivers in stop-and-go traffic will likely see numbers close to the city MPG estimate, while highway drivers may get slightly above 25 MPG. Aggressive driving, like quick acceleration and hard braking, will also hurt fuel economy. Consistent, smooth driving can help you get closer to the EPA’s estimates. The K900’s trip computer and fuel economy monitor show real-time feedback on your efficiency, so you can adjust your driving.

How it compares

The K900’s fuel economy is similar to other full-size luxury sedans, but not the best. The BMW 740i, with a 3.0L inline-six, gets an EPA-estimated 22 MPG combined, while the Mercedes-Benz S450, with a 3.0L inline-six, gets 23 MPG combined. The Lexus LS 500, with a 3.5-liter V6, gets 21 MPG combined, matching the K900. The Genesis G90, which has a similar platform and engine, gets 20 MPG combined. These small fuel economy differences are not as important as styling, features, and brand. To view all Kia fuel economy data, visit our Kia page. Looking at K900 MPG across all years can help you see trends in fuel efficiency.

Tips to maximize efficiency

Proper tire inflation is important for maximizing fuel economy. Underinflated tires increase resistance, making the engine work harder. Check the sticker on the driver’s side doorjamb for the correct tire pressure and check your tires often.

Avoid idling. If you’ll be stopped for more than a minute, turn off the engine. Modern engines restart quickly, and idling wastes fuel. This is very important in city driving.

Use cruise control on the highway. Keeping a constant speed helps gas mileage and avoid extra acceleration and slowing down. Pay attention to traffic and turn off cruise control to keep a safe distance.

Reduce weight in the car. Extra cargo adds weight, which increases fuel use. Remove extra items from the trunk and passenger area to lighten it. Even small weight reductions can help.

Consider using the K900’s Eco driving mode, if the car has it. This adjusts throttle response and transmission shift for fuel efficiency. While it may reduce performance a little, it can save fuel during normal driving. This is useful for long highway trips.