19 MPG combined. That’s the fuel economy for the 2018 Genesis G80 when equipped with its roaring 5.0-liter V8 engine and rear-wheel drive. It’s not a number intended to win any awards for lower fuel costs. Buyers of this G80 configuration aren’t prioritizing peak efficiency; they’re seeking a blend of luxury, performance, and value, and they’re willing to accept a somewhat thirsty engine to get it. They value the confident power and classic V8 rumble more than squeezing out an extra mile or two per gallon.

City and highway performance

The EPA estimates 16 MPG in the city and 24 MPG on the highway for this G80. The city figure reflects stop-and-go traffic, where the large V8 has to work harder to move the substantial sedan. The highway number is better, showing the benefits of the eight-speed automatic transmission, which allows the engine to cruise at lower RPMs for increased efficiency on long drives. However, drivers with a lead foot should expect highway numbers closer to 20 MPG.

Annual fuel cost

According to the EPA, the annual fuel cost for the 2018 Genesis G80 RWD 5.0L V8 is approximately $3,050. This figure is based on driving 15,000 miles per year and using the national average fuel price at the time of calculation. Of course, actual fuel costs will vary depending on driving habits and fluctuations in gasoline prices. Someone who primarily drives in the city and accelerates quickly could easily exceed this estimate, while a driver who mostly logs highway miles and drives more conservatively might spend less. Regardless, $3,050 per year is a significant expense that prospective buyers should consider.

Real-world expectations

The EPA estimates offer a standardized benchmark, but real-world fuel economy can often differ. Owners of the 2018 Genesis G80 5.0L RWD should anticipate an average of around 17-21 MPG in mixed driving conditions. Hard acceleration and frequent short trips will pull the average closer to the lower end of that range, while smooth driving and longer journeys can push it towards the higher end. Ultimately, the actual MPG will depend on driving styles and the specific environment.

How it compares

Compared to its competitors, the 2018 Genesis G80 5.0L’s fuel economy sits in the middle. For instance, the BMW 550i xDrive from the same year, with its 4.4-liter V8 and all-wheel drive, achieves a slightly better 17 MPG city and 25 MPG highway. However, the Lexus GS 350 RWD, with its smaller 3.5-liter V6, manages only 20 MPG city and 28 MPG highway, numbers that aren’t drastically better despite the smaller engine. The Cadillac CTS V-Sport with its turbo V6 offers 16 MPG city and 24 MPG highway, essentially matching the G80. These comparisons show that V8 power comes at a cost. Buyers considering the G80 5.0L are typically less concerned about maximizing fuel efficiency than they are about the strong power and refined driving experience that the V8 provides, a trade-off that some competitors with smaller engines force them to accept.

For those seeking better mileage within the Genesis lineup, researching all Genesis fuel economy data and comparing G80 MPG across all years is a worthwhile endeavor.

Tips to maximize efficiency

While the 2018 Genesis G80 5.0L RWD isn’t designed for ultimate fuel efficiency, there are still several steps drivers can take to improve their MPG. Avoid hard acceleration and braking, as these actions consume significant fuel. Gentle and gradual inputs on the accelerator and brakes are key.

Ensure proper tire inflation. Underinflated tires create more rolling resistance, which forces the engine to work harder and reduces fuel economy. Check your tires regularly and inflate them to the recommended pressure listed on the driver’s side doorjamb.

Regular maintenance, including oil changes and air filter replacements, is critical. A clean air filter allows the engine to breathe easier, while fresh oil reduces friction and improves efficiency. Following the manufacturer’s recommended maintenance schedule can help keep your G80 running well.

Minimize unnecessary weight in the vehicle. Carrying extra cargo increases the load on the engine, reducing fuel economy. Remove any items from the trunk or cabin that aren’t essential.

Use cruise control on the highway. Maintaining a consistent speed helps to optimize fuel consumption. Cruise control not only reduces driver fatigue on long trips but also helps prevent unintended speed fluctuations that can negatively impact MPG.