EPA Fuel Economy: 32 MPG Combined

The 2023 Nissan Altima 2.5L 4-cylinder S delivers solid fuel efficiency with an EPA-estimated combined rating of 32 MPG. This midsize sedan achieves 28 MPG in city driving and 38 MPG on the highway, making it a practical choice for commuters who balance urban and interstate travel. The 2.5L four-cylinder engine paired with a continuously variable transmission (CVT) provides a responsive driving experience while maintaining respectable fuel economy in its class. For drivers seeking a reliable sedan that doesn’t sacrifice performance for efficiency, the 2023 Altima S offers a well-rounded package.

The 32 MPG combined rating positions the Altima competitively among mainstream midsize sedans. This efficiency level means fewer fill-ups throughout the year and reduced fuel expenses compared to larger vehicles or those with less efficient drivetrains. The CVT automatic transmission plays a key role in achieving these numbers by optimizing engine RPMs across various driving conditions, helping the 2.5L engine operate in its most efficient range more consistently than traditional automatic transmissions.

City vs Highway Performance

The distinction between city and highway fuel economy is significant for the 2023 Altima S. In city driving, you’ll see 28 MPG as the EPA rating. City driving involves frequent acceleration, braking, and lower speeds—all factors that increase fuel consumption. This 28 MPG city rating reflects realistic performance during typical urban commutes with traffic lights, stop signs, and variable speeds.

On the highway, the Altima excels with an EPA-estimated 38 MPG. Highway driving allows the engine to maintain consistent speeds and steady throttle input, which maximizes fuel efficiency. The 10 MPG difference between city and highway ratings is typical for four-cylinder sedans and demonstrates how driving conditions significantly impact fuel economy. If your commute is primarily highway-based, you’ll likely see overall fuel costs closer to the 38 MPG estimate. Conversely, drivers in congested urban areas may experience results closer to the 28 MPG city figure.

Annual Fuel Cost

Based on EPA estimates and typical driving patterns, here’s what you can expect to spend annually on fuel for the 2023 Nissan Altima 2.5L S:

Calculation: With a combined EPA rating of 32 MPG, driving 15,000 miles per year, and assuming a fuel price of $3.50 per gallon:

Miles driven annually ÷ MPG rating = Gallons needed
15,000 miles ÷ 32 MPG = 468.75 gallons per year
468.75 gallons × $3.50 per gallon = $1,640.63 annual fuel cost

This estimate provides a baseline for budgeting. Actual costs will vary depending on local fuel prices, driving habits, and the specific blend of city versus highway miles you accumulate. Drivers who spend more time on highways may see slightly lower annual costs due to the superior 38 MPG highway rating.

Real-World MPG Expectations

While EPA estimates provide a standardized benchmark, real-world fuel economy depends on multiple factors. Most owners of the 2023 Altima S report achieving fuel economy within 1-3 MPG of the EPA combined estimate under normal driving conditions. Several variables influence your actual results: aggressive acceleration consumes more fuel than gradual throttle input, excessive idling reduces overall efficiency, and underinflated tires increase rolling resistance and fuel consumption.

To approach the EPA estimates, maintain steady speeds, anticipate traffic flow to minimize unnecessary braking, keep tires properly inflated to the manufacturer’s recommended PSI, and avoid carrying excess weight in the vehicle. Cold weather also temporarily reduces fuel economy until the engine reaches operating temperature, and air conditioning use increases fuel consumption. Regular maintenance, including clean fuel filters and proper engine oil viscosity, helps the 2.5L engine operate at peak efficiency.

How It Compares

The 2023 Altima S’s 32 MPG combined rating compares favorably within the midsize sedan segment. The Honda Accord, a direct competitor with a similar 2.0L turbocharged four-cylinder, achieves approximately 31 MPG combined, placing it marginally behind the Altima. The Toyota Camry with a 2.5L four-cylinder offers roughly 32 MPG combined as well, matching the Altima’s efficiency. The Hyundai Sonata with a 2.5L engine delivers similar numbers around 31-32 MPG combined. The Altima’s CVT transmission gives it a slight advantage in maintaining consistent efficiency compared to traditional automatics found in some competitors.

Tips to Maximize Efficiency

• Maintain Proper Tire Pressure: Check your tire pressure monthly and keep tires inflated to the PSI listed on your driver’s door jamb, not the sidewall maximum. Underinflated tires significantly reduce fuel economy.
• Drive Smoothly: Avoid rapid acceleration and hard braking. Smooth, gradual throttle input allows the CVT to keep the engine in its optimal efficiency zone.
• Reduce Idle Time: Modern engines use minimal fuel at startup, so if you’ll be stopped for more than 10 seconds, consider turning off the engine rather than idling.
• Use Cruise Control on Highways: Cruise control maintains steady speeds more consistently than manual throttle control, improving highway fuel economy.
• Keep Up with Maintenance: Regular oil changes, air filter replacements, and engine tune-ups help your 2.5L engine operate efficiently.

Frequently Asked Questions

Q: What type of fuel should I use in the 2023 Altima 2.5L S?
A: The Altima 2.5L S runs on regular unleaded gasoline with an octane rating of 87. Using premium fuel provides no additional benefit and only increases your fuel costs.

Q: Is the CVT transmission reliable in the Altima?
A: The CVT in the 2023 Altima has proven reliable across the model line. Regular transmission fluid checks and services as recommended in your owner’s manual will help ensure longevity.

Q: Can I expect to achieve the EPA highway rating of 38 MPG regularly?
A: Many owners achieve or slightly exceed the 38 MPG highway estimate during steady highway driving, particularly at moderate speeds between 55-65 MPH. Driving faster or with heavy loads will reduce this figure.

The 2023 Nissan Altima 2.5L S provides dependable fuel economy that appeals to practical sedan buyers. With a 32 MPG combined rating and the potential for 38 MPG on the highway, this four-cylinder midsize sedan delivers efficiency without compromising the comfort and features expected in its class.