The 2017 Genesis G80 RWD with its 5.0L V8 gets 18 MPG combined, a figure that buyers likely understand and accept. This vehicle isn’t purchased for fuel efficiency. It’s a statement, a deliberate choice of power, a preference for the effortless surge that only a naturally aspirated V8 can deliver, wrapped in understated Korean luxury. This driver prioritizes the deep rumble and readily available torque over the fuel savings offered by smaller, boosted engines. They know the trade-off, and they’re making a conscious choice.

City and highway performance

The EPA estimates 15 MPG in the city and 23 MPG on the highway for this specific G80 configuration. The city figure reflects the engine’s thirst during stop-and-go driving; the V8 needs to work harder to get the sizable sedan moving from a standstill. The highway number, while still not stellar, is more palatable because the smooth-shifting eight-speed automatic transmission allows the engine to cruise comfortably at lower RPMs. This gap between city and highway MPG emphasizes that this G80 prefers the open road, where its powerful engine can stretch its legs without constant acceleration and deceleration.

Annual fuel cost

Fuel consumption translates to an EPA-estimated annual fuel cost of $3,200. This figure is calculated based on driving 15,000 miles per year, using the EPA’s combined MPG data and the national average fuel price at the time of calculation. Anyone considering this G80 should view this $3,200 figure as a realistic baseline; the actual cost could be higher depending on driving habits and local fuel prices. It represents a significant ongoing expense, and it should be factored into the overall cost of ownership.

Real-world expectations

While the EPA figures provide a benchmark, real-world fuel economy often varies. Aggressive driving, frequent short trips, and consistently heavy loads will all push the MPG downward.

On the other hand, a driver with a light foot, a mostly highway commute, and consistent maintenance might see figures closer to the EPA estimates, or even slightly better. Also, elevation can play a big part. Drivers in mountainous areas will likely observe lower MPG, and those at sea level might get slightly better mileage. Ultimately, individual driving styles and conditions will be the determining factors. Take a look at G80 MPG across all years to see if other model years with the 5.0L may offer better (or worse) mileage.

How it compares

The 2017 G80 5.0 RWD’s fuel economy puts it at a disadvantage compared to some of its competitors. For instance, a BMW 540i with its turbocharged inline-six achieves 23 MPG combined. Even a Mercedes-Benz E450 4MATIC with its turbocharged inline-six and all-wheel drive manages about 25 MPG combined. Within the Genesis lineup, a G80 with the turbocharged 3.3L V6 offers significantly better fuel economy, closer to 22 MPG combined.

This comparison is vital for buyers weighing performance against efficiency. The V8 delivers a distinct driving experience, but at a clear cost at the pump. If fuel economy is a higher priority, other options, both within Genesis and from competing brands, are more sensible choices. You can find all Genesis fuel economy data on our site.

Tips to maximize efficiency

Gentle acceleration is key. The 5.0L V8 has abundant torque, meaning you don’t need to bury your foot in the throttle to get up to speed. Smooth, gradual acceleration will conserve fuel, especially in city driving. Keep an eye on the tachometer and avoid revving the engine unnecessarily. A gentle driving style might not unlock miraculous savings, but any improvement helps.

Maintain proper tire inflation. Ensuring your tires are inflated to the recommended pressure reduces rolling resistance, which improves fuel economy. Check your owner’s manual or the sticker on the driver’s side doorjamb for the correct pressure. Regular tire pressure checks are a simple way to optimize fuel efficiency.

Limit idling. Letting the engine idle for extended periods consumes fuel without moving the car. If you’re waiting for someone or stopped for more than a minute, turn off the engine. Modern cars are designed to restart quickly and efficiently. Yes, that V8 sounds great at idle, but the fuel pump doesn’t care.

Consider using premium fuel. While the G80 5.0L might not explicitly require premium fuel, it’s designed to perform optimally with it. Premium fuel can sometimes improve fuel economy slightly, especially in engines with high compression ratios. While premium fuel costs more, this can balance the increased fuel efficiency. Experiment to see if premium fuel provides a noticeable improvement in your G80’s performance and fuel economy.

Reduce unnecessary weight. Carrying extra weight in the trunk or back seat forces the engine to work harder, reducing fuel economy. Remove any items you don’t need, such as golf clubs, extra tools, or unused sports equipment. Decluttering your G80 can subtly improve its efficiency.