23 MPG combined isn’t going to win the 2021 Chrysler 300 3.6L any fuel economy awards, but that figure misses the point. This is a large, comfortable, traditionally-styled sedan with available V8 power and a relatively affordable price tag. Efficiency is considered, but it’s hardly the main reason the 300’s loyal fans buy it.

City and highway performance

The 2021 Chrysler 300 with the 3.6L V6 gets 19 MPG in the city and a respectable 30 MPG on the highway. That difference reflects the engine’s design. It’s a smooth, torquey powerplant that works well in stop-and-go driving, and shines when cruising at higher speeds. The eight-speed automatic transmission also helps highway efficiency, keeping the engine in its sweet spot for both power delivery and fuel conservation when the open road calls. Those seeking even better highway numbers might consider the RWD variant, which often outperforms AWD versions in real-world testing because it weighs less and has reduced drivetrain losses. However, the AWD offers a significant advantage to those in colder climates with snow and ice.

Annual fuel cost

The EPA estimates that the 2021 Chrysler 300 3.6L will cost its owner $1,900 per year in fuel. This calculation is based on driving 15,000 miles annually, with 55% of those miles driven in the city and 45% on the highway. The EPA also uses the national average fuel price when calculating this figure. Keep in mind that your actual fuel costs may vary depending on your driving habits, fuel prices in your area, and the specific trim level and options of your 300.

Real-world expectations

While the EPA figures provide a useful baseline, real-world fuel economy often differs. Owners who frequently drive in heavy traffic or have a lead foot will likely see numbers below the EPA’s 19 MPG city estimate. Conversely, drivers who primarily use their 300 for long highway commutes with consistent speeds may be able to achieve, or even exceed, the 30 MPG highway figure. A lot depends on individual driving style and how well the vehicle is maintained. Properly inflated tires, regular oil changes, and a clean air filter all help with optimal fuel efficiency. Aggressive acceleration and hard braking are enemies of good gas mileage. A measured approach to driving will save you money at the pump.

How it compares

The 2021 Chrysler 300 3.6L is unique in the market and its fuel economy tells a story compared to other large sedans. The Toyota Avalon, for instance, achieves around 26 MPG combined with its V6 engine, reflecting Toyota’s focus on efficiency. A similarly sized Nissan Maxima also delivers around 25 MPG combined. Even some smaller sedans with turbocharged four-cylinder engines, like the Honda Accord 2.0T (26 MPG combined), can offer superior fuel economy. However, these vehicles lack the Chrysler 300’s imposing presence, rear-wheel-drive option, and available V8 rumble. For those prioritizing fuel efficiency above all else, there are better choices. But for buyers who value classic American sedan styling, spaciousness, and available V8 power, the Chrysler 300’s compromises, including its 23 MPG, are often acceptable. The Avalon and Maxima appeal to a different buyer altogether.

Tips to maximize efficiency

Use cruise control whenever possible on the highway. Maintaining a consistent speed will significantly improve your fuel economy. The 300’s engine management system is optimized for steady-state cruising, and the cruise control helps maintain that state with precision.

Avoid aggressive acceleration. The Chrysler 300, especially with the V6, has ample power, but stomping on the accelerator will dramatically reduce fuel economy. Gentle acceleration allows the engine to operate more efficiently.

Keep your tires properly inflated. Underinflated tires increase rolling resistance, which reduces fuel economy. Check your tire pressure regularly and inflate them to the pressure recommended on the sticker inside the driver’s side doorjamb. This simple step can make a noticeable difference.

Lighten the load. Carrying unnecessary weight in your trunk or passenger compartment reduces fuel economy. Remove any items you don’t need to carry on a regular basis. Every little bit helps, and the 300 has a generously sized trunk that can quickly accumulate unnecessary cargo.

Consider your driving route. Plan your trips to avoid areas with heavy traffic congestion, if possible. Stop-and-go driving consumes significantly more fuel than cruising at a steady speed. A slightly longer route with less traffic may ultimately save you time and money.

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