The 2015 Honda Accord 3.5L V6 achieves 24 MPG combined fuel economy. While a reasonable figure, fuel efficiency isn’t the primary reason buyers choose this model. They prefer the V6 engine for its smooth power delivery and confident acceleration, accepting the MPG trade-off for a more engaging driving experience compared to the capable 4-cylinder models. This isn’t a fuel-sipping hybrid; it’s a comfortable, reliable sedan with extra power.

City and highway performance

EPA estimates place the 2015 Accord V6 at 21 MPG in the city and 31 MPG on the highway. The city figure reflects the engine’s behavior in stop-and-go traffic, where the larger engine size and increased fuel demand become apparent. The highway number is more respectable. This is partly due to the Accord’s well-engineered chassis, aerodynamic design, and automatic transmission. The transmission uses its six speeds to keep the engine operating at relatively low RPMs during steady cruising, minimizing fuel consumption on longer trips. Drivers doing consistent highway driving at reasonable speeds will often meet, or even slightly exceed, the EPA’s projection.

Annual fuel cost

The EPA calculates the annual fuel cost for the 2015 Honda Accord 3.5L V6 at exactly $1,800. This figure is based on driving 15,000 miles per year, using the EPA’s combined MPG estimate, and assumes fuel prices mirror the national average at the time of calculation. Your actual cost will vary depending on your driving habits, the type of driving you do (city versus highway), and prevailing fuel prices in your area. Drivers who consistently drive aggressively or spend most of their time in gridlocked city traffic are likely to see a higher annual fuel bill than the official EPA projection.

Real-world expectations

EPA estimates provide a standardized baseline, but real-world MPG can differ. Many 2015 Honda Accord 3.5L owners report figures close to the EPA estimates, and acknowledge the importance of driving style. Gentle acceleration, consistent speeds, and minimal idling contribute to better fuel economy. Aggressive driving, frequent short trips, and heavy loads will reduce it. Those who regularly commute in congested urban areas may find achieving the 21 MPG city estimate challenging, while drivers who prioritize highway travel could see closer to 31 MPG, sometimes a bit more.

How it compares

The 2015 Honda Accord’s fuel economy is generally competitive compare to other mid-size sedans with V6 engines from the same year. The Toyota Camry V6, for example, posts similar numbers with an EPA combined rating of 25 MPG. The Nissan Altima 3.5 SL gets around 26 MPG combined. While these competitors offer slightly better fuel efficiency, the differences aren’t huge.

Stepping down to a four-cylinder in the Honda Accord improves the MPG considerably. The 2015 Honda Accord 2.4L achieves 31 MPG combined (automatic transmission), showing the fuel economy benefit of the smaller, less powerful engine. V6 buyers are making a conscious choice, trading a tangible MPG improvement for a more responsive and powerful engine option. For reference, browse ACCORD MPG across all years.

Tips to maximize efficiency

Avoid aggressive acceleration. The Accord V6 responds eagerly to throttle inputs, but rapid acceleration consumes a significant amount of fuel. Gently ease onto the accelerator to maximize fuel efficiency, especially in city driving. Anticipate traffic flow and maintain a steady speed, rather than rapidly accelerating and braking.

Properly inflate your tires. Underinflated tires increase rolling resistance, which reduces fuel economy. Check your tire pressure regularly, ideally once a week, and inflate them to the recommended pressure listed on the tire placard located on the driver’s side doorjamb. Even a few PSI below the recommended pressure can noticeably impact fuel consumption.

Minimize idling. Letting your engine idle for extended periods consumes fuel without covering any distance. If you’re waiting for someone or expect a delay of more than a minute or two, shut off the engine. Modern engines are designed to restart quickly and reliably, and restarting consumes less fuel than prolonged idling.

Use cruise control carefully. On relatively flat highways, cruise control can help maintain a consistent speed, optimizing fuel economy. However, it’s less effective in hilly or mountainous terrain, where the system may frequently downshift to maintain speed, possibly reducing some efficiency gains. In such situations, manual throttle control may be more efficient.

Regular maintenance is important. A well-maintained engine operates more efficiently. Follow the manufacturer’s recommended maintenance schedule, including regular oil changes, air filter replacements, and spark plug checks. Clogged air filters and worn spark plugs can negatively impact fuel economy. Refer to all Honda fuel economy data for information.