18 MPG combined shows something important about the 2016 Kia K900 5.0L V8: it’s made to give a smooth, strong, and luxurious experience, not to win any fuel efficiency contests. Buyers who want the K900 with its sonorous V8 aren’t putting trips to the gas station first; they want easy acceleration and a comfortable ride, and they’re willing to pay more at the pump for it.

City and highway performance

The EPA estimates for the K900’s 5.0L V8 are 15 MPG in the city and 22 MPG on the highway. The city figure shows the engine’s thirst when constantly accelerating from a standstill. The highway rating, while not great, is better. It shows that the K900, with its eight-speed automatic transmission, can get reasonable economy during steady cruising. These are just estimates. Aggressive driving will lower those numbers a lot, while a light foot and good conditions could give slightly better results.

Annual fuel cost

The EPA says the annual fuel cost for the 2016 Kia K900 5.0L V8 is $2,450. This assumes 15,000 miles of driving per year, with a mix of city and highway conditions, using national average fuel prices. This figure shows the fuel expenses of owning this K900. It’s an important thing to consider when thinking about the overall cost. Buyers should know that changing gas prices will affect this annual cost, and their own driving habits may greatly increase or slightly decrease it.

Real-world expectations

The EPA’s figures are a good starting point, but real-world MPG will change. Drivers who often accelerate quickly or face heavy traffic should expect numbers closer to the 15 MPG city figure, even in combined driving. However, those who mainly use the K900 for long highway trips, keeping consistent speeds and avoiding quick moves, may see results closer to or even slightly above the EPA’s 22 MPG highway estimate. The car’s weight, the engine’s responsiveness, and the driving style all affect the final number.

How it compares

Looking at its competitors, the 2016 Kia K900 5.0L V8’s fuel economy isn’t a highlight. For example, the Mercedes-Benz S550 from the same year, while more powerful, gets similar numbers if it is the RWD version and sometimes slightly better if you look at some model years. The BMW 750i, another V8-powered competitor, often falls in the same area, around 16 city and 25 highway. These comparisons show that the K900’s fuel consumption is normal for a large, V8-powered luxury sedan. This information is important for buyers comparing models to see if they should look at other K900 models or all Kia fuel economy data.

Tips to Maximize Efficiency

The K900’s V8 works well with smooth acceleration and steady throttle. Avoid sudden speed increases when possible, since these burn much more fuel. Watch traffic and brake slowly to waste less fuel through unnecessary acceleration and deceleration.

Make sure your tires are inflated and maintained. Low tire pressure increases rolling resistance, making the engine work harder and reducing fuel economy. Check tire pressures often and inflate to the manufacturer’s settings, usually found on a sticker inside the driver’s side door.

Keep idling time short. Idling burns fuel without going anywhere. If you’ll be stopped for more than a minute, it’s usually better to turn off the engine and restart it. The K900’s refined engine restarts quickly and smoothly.

Reduce extra weight in the car. Carrying extra items adds to the car’s weight, which hurts fuel economy. Remove anything not needed to reduce the load on the engine. Don’t forget that you can see the K900 MPG across all years to see how your model year compares.

Consider different drive modes, if the car has them. Some luxury cars offer an “Eco” mode that helps fuel efficiency by changing throttle response and transmission shift points. Try different modes to find the best balance between performance and fuel economy for how you drive.