24 MPG combined is an acceptable figure for the 2019 Buick LaCrosse with its 3.6L V6. This isn’t a car for hypermilers; it’s a full-size sedan designed for comfortable cruising, effortless highway passing, and a relaxed driving experience. Buyers prioritize space, a plush ride, and a quiet cabin. Fuel economy is a consideration, not the primary deciding factor.

City and highway performance

The EPA estimates 20 MPG in the city and 30 MPG on the highway for the 2019 Buick LaCrosse 3.6L. The city number reflects stop-and-go traffic, naturally causing the larger V6 to consume more fuel. The highway figure, however, is more impressive. The LaCrosse excels on long road trips, eating up miles with ease and returning respectable fuel economy for a car of its size.

The nine-speed automatic transmission is key here, allowing the engine to stay in its most efficient range at cruising speeds. Aggressive acceleration will, of course, impact fuel consumption, but driven moderately, the LaCrosse can meet or even slightly exceed that 30 MPG highway rating.

Annual fuel cost

The EPA estimates the annual fuel cost for the 2019 Buick LaCrosse 3.6L at $1,800. This figure is based on driving 15,000 miles per year and using national average fuel prices. Keep in mind that your actual fuel costs will vary depending on your driving habits, local fuel prices, and the type of fuel you use. Those who drive mostly in the city or have a heavier foot will likely spend more than the EPA estimate.

Understanding this figure provides a baseline to compare the LaCrosse’s running costs against other vehicles.

Real-world expectations

While the EPA provides a standardized testing methodology, real-world fuel economy can vary significantly. Several factors influence the MPG you’ll actually see, including driving style, road conditions, weather, and vehicle maintenance. Someone who frequently accelerates hard or drives in congested traffic will likely see lower numbers than someone who primarily cruises on the highway.

Properly maintained tires, regular oil changes, and avoiding unnecessary weight in the vehicle can also improve fuel economy. Don’t expect to consistently achieve the EPA numbers in all driving situations, but with focused driving habits, you can get close.

How it compares

Compared to its competitors, the 2019 Buick LaCrosse 3.6L offers a mid-pack fuel economy rating. The Toyota Avalon, for example, achieves a slightly better combined MPG of 26 with its V6 engine, making it a more fuel-efficient option in the large sedan segment. The Chrysler 300 with its standard V6 engine mirrors the LaCrosse’s 24 MPG combined.

For buyers considering alternatives, these differences in MPG translate to real-world savings at the pump, even though they might seem small on paper. Those prioritizing fuel economy might also consider the LaCrosse’s eAssist mild-hybrid model, which is no longer available in 2019 but offered better MPG in previous years. You can find all all Buick fuel economy data here.

Tips to maximize efficiency

Take advantage of the LaCrosse’s cruise control, especially on highway drives. Maintaining a consistent speed minimizes unnecessary acceleration and deceleration, which can significantly improve your fuel economy. Also, the car’s nine-speed transmission generally keeps the engine in a low-RPM range at highway speeds. Resist the urge to frequently pass or accelerate aggressively.

Ensure your tires are properly inflated and your car is well-maintained. Underinflated tires create more rolling resistance, which decreases fuel efficiency. Regular maintenance, such as oil changes and air filter replacements, keeps the engine running smoothly and efficiently. Neglecting these simple tasks can lead to a noticeable drop in MPG.

Minimize idling time whenever possible. If you’re stopped for more than a minute or two, turn off the engine. Modern engines are designed to restart quickly and efficiently, and idling consumes fuel without moving the car. This is especially important in city driving, where frequent stops are common.

Consider using a fuel additive designed to clean fuel injectors and combustion chambers. Over time, deposits can build up in the engine, reducing its efficiency. These additives can help remove those deposits and restore some of the engine’s original performance and fuel economy. Read instructions and warnings that may be on the packaging.

Avoid carrying unnecessary weight in the vehicle. Extra weight puts more strain on the engine, requiring more fuel to accelerate and maintain speed. Remove any items from the trunk or back seat that you don’t need on a regular basis. Every pound counts when it comes to fuel efficiency.

Finally, you can research the LACROSSE MPG across all years to see how it has changed.