21 MPG combined is unlikely to be the main reason someone buys a 2016 Buick LaCrosse with the 3.6L V6. This isn’t a car purchased for hypermiling; it’s a comfortable, spacious sedan aimed at buyers who value a smooth ride and quiet cabin over outright fuel efficiency. The LaCrosse delivers a pleasant experience, and while its fuel consumption isn’t class-leading, it’s a trade-off many of its buyers willingly accept for the car’s other attributes.

City and highway performance

The EPA estimates for the 2016 LaCrosse 3.6L reveal more about its driving characteristics. 18 MPG in the city reflects the engine’s willingness to deliver power at low speeds, useful for stop-and-go traffic. The six-speed automatic transmission does its job smoothly. On the highway, the 28 MPG rating shows the engine is relaxed at cruising speeds, contributing to the quiet cabin that LaCrosse owners appreciate. This split between city and highway MPG is characteristic of larger, naturally aspirated engines, which tend to perform better on the open road.

Annual fuel cost

The EPA calculates the annual fuel cost for the 2016 Buick LaCrosse 3.6L at $2,100. This figure is based on 15,000 miles of driving per year, with 55% of those miles driven in the city and 45% on the highway, and using the national average fuel price. This cost is a useful yardstick for comparing running costs with other vehicles, but individual expenses can vary significantly depending on driving habits and local fuel prices. It’s important to remember that fluctuating gas prices can have a notable impact on the actual amount you’ll spend at the pump.

Real-world expectations

While EPA estimates offer a standardized benchmark, real-world MPG often differs. LaCrosse drivers who spend a majority of their time in congested urban environments will likely see figures closer to the 18 MPG city rating, potentially even lower during periods of heavy traffic and aggressive driving. Conversely, those who primarily use their LaCrosse for long highway commutes may find their fuel economy exceeding the 28 MPG highway estimate, especially when using a light foot and cruise control on flat terrain.

How it compares

The 2016 Buick LaCrosse wasn’t designed to compete with hybrid sedans. A Toyota Avalon, for example, with its hybrid powertrain, achieves an EPA-estimated 40 MPG city and 39 MPG highway. However, the Avalon prioritizes fuel economy, potentially at the expense of the LaCrosse’s more traditional luxury feel. Even a V6-powered Avalon, with 21 MPG combined, betters the LaCrosse. Comparing it to other V6-powered competitors in its class shows the LaCrosse is about average; A 2016 Chrysler 300 with the 3.6L V6 also nets 21 MPG combined. The value lies in whether LaCrosse buyers are willing to accept mid-pack fuel economy in exchange for other characteristics they value.

Tips to maximize efficiency

Gentle acceleration is key to saving fuel in the LaCrosse 3.6L. Avoid sudden bursts of speed, as this forces the engine to consume more fuel to deliver the requested power. Smooth, gradual acceleration allows the engine to operate more efficiently, especially in city driving.

Regular maintenance, including timely oil changes and air filter replacements, ensures the engine is operating at its peak. A well-maintained engine runs more efficiently and consumes less fuel. Keeping tires properly inflated also reduces rolling resistance and can improve fuel economy.

Minimize idling. If you anticipate being stopped for more than a minute, turn off the engine. Idling consumes fuel without covering any distance. This is especially effective in urban settings where frequent stops are unavoidable. Anticipating traffic flow can help avoid unnecessary idling.

Consider lighter wheels and low-rolling-resistance tires when it’s time for replacement. These can subtly improve fuel economy without sacrificing the LaCrosse’s comfortable ride quality. Even small improvements can add up over the life of the vehicle.

Monitor your driving habits. The LaCrosse’s driver information center can provide real-time and average fuel economy data. Pay attention to these figures and adjust your driving style accordingly. You can find all Buick fuel economy data and LACROSSE MPG across all years to compare against your own results.