The 2017 Infiniti Q70 with the 5.6L V8 engine gets 19 MPG combined, a fuel economy figure placing it among luxury sedans that prioritize power and responsiveness over ultimate efficiency. This car is for drivers who value effortless acceleration and confident handling, accepting fuel costs as part of the ownership experience.

City and highway performance

The EPA estimates the Q70 5.6L gets 16 MPG in the city and 24 MPG on the highway. The city MPG reflects the engine’s fuel consumption in stop-and-go traffic, due to its large displacement and performance tuning. The highway MPG, while not class-leading, shows the engine’s comfortable cruising ability at higher speeds without excessive strain. The automatic transmission’s gearing helps with the highway fuel economy. Note that achieving 24 MPG requires resisting the urge to use the V8’s power for passing.

Annual fuel cost

The EPA estimates the annual fuel cost for the 2017 Infiniti Q70 5.6L at $3,050. This is calculated based on 15,000 miles driven per year, with 55% in the city and 45% on the highway, using EPA fuel economy estimates. The calculation uses a national average fuel price, which changes. Your actual fuel costs can vary depending on driving habits, fuel type, and fuel prices. The $3,050 figure is a benchmark, but consider your driving patterns for a more accurate estimate. It is highly encouraged that you check local fuel prices which will vary greatly from the national average.

Real-world expectations

EPA estimates offer a standard, but real-world MPG can differ. Expect figures slightly lower than the EPA’s 19 MPG combined, especially with frequent city driving or aggressive acceleration. Drivers who prioritize fuel efficiency with smoother driving may approach or slightly exceed EPA estimates. Extracting maximum efficiency from this engine requires conscious effort and sacrificing some performance.

How it compares

The Q70 5.6L’s fuel economy is not competitive compared to its rivals. A BMW 540i, for example, has an EPA combined rating of 25 MPG with its turbocharged inline-6, offering a significant advantage in efficiency without sacrificing performance. The Mercedes-Benz E450 4Matic with its inline-6 turbo gets 26 MPG combined. Choosing the Q70 means prioritizing V8 power over saving money on gas. Even a Q70 with smaller engine options offers an improvement in MPG; consider looking at the Q70 MPG across all years.

Tips to maximize efficiency

The 5.6L V8 is responsive, but heavy acceleration reduces fuel economy. Anticipate traffic flow, keep a consistent speed, and avoid unnecessary acceleration to save fuel. Gradual acceleration uses less fuel than quick acceleration.

Keep tires inflated to the manufacturer’s recommended pressure. Underinflated tires increase rolling resistance, making the engine work harder and use more fuel. Check tire pressure regularly, especially with temperature changes.

On the highway, use the Q70’s cruise control when safe. Cruise control helps keep a steady speed, reducing speed changes that waste fuel. Avoid using cruise control in hilly areas, where the system may downshift aggressively to maintain speed, which cancels out any MPG benefit.

Regular maintenance, including oil changes and air filter replacements, helps the engine run efficiently. A well-maintained engine is more efficient. Skipping maintenance can reduce performance and increase fuel consumption.

Reduce extra weight in the car. The lighter the car, the less fuel it uses. Remove unnecessary items from the trunk, and avoid carrying heavy loads unless needed. Learn more about all Infiniti fuel economy data.