17 MPG combined. That’s the fuel economy for the 2019 Cadillac XTS Hearse with the 3.6L V6. This figure isn’t going to be winning any awards. But this isn’t a vehicle bought for its fuel economy. It’s a purpose-built machine, a specialized tool in the hands of funeral directors who prioritize space, reliability, and a dignified presence over outright efficiency.

City and highway performance

The EPA estimates 15 MPG in the city and 21 MPG on the highway for this particular XTS Hearse configuration. The difference between city and highway figures isn’t huge, reflecting the somewhat consistent demands placed on the engine regardless of driving environment. Consider the typical use case: slow, deliberate processions through city streets, interspersed with longer highway runs between funeral homes, cemeteries, and the families they serve. It’s not stop-and-go drag racing, but a steady, considered pace. The six-speed automatic transmission, while not the most modern design, is reliable and well-suited to the task, prioritizing smooth shifts over maximizing fuel economy. The 3.6L V6, while adequate, is working to haul a substantial vehicle, and the fuel economy reflects that strain.

Annual fuel cost

The EPA estimates the annual fuel cost for the 2019 Cadillac XTS Hearse at $2,600. This figure is based on driving 15,000 miles per year, using the EPA’s assumed fuel price averages. Actual fuel costs will vary depending on local fuel prices and individual driving habits. The $2,600 serves as a useful benchmark for budgeting and comparison purposes. It’s a tangible representation of the cost of doing business with this vehicle.

Real-world expectations

While the EPA provides a standardized estimate, real-world MPG can fluctuate. The weight carried in the vehicle certainly impacts fuel consumption, and so does idle time, which is a real consideration for a hearse—waiting at a service, sitting in a procession. These vehicles are often maintained meticulously, with required services performed on time or early. Consider that this level of maintenance is not always reflected in “normal” EPA testing. All things considered, expect that figure of 17 to be an optimistic estimate in many working examples. It’s more likely that funeral homes will only get the low- to mid-teens fuel economy that they’ve come to expect from their vehicles.

How it compares

There aren’t many direct competitors to the XTS Hearse, but comparing it to other large, V6-powered vehicles offers some perspective. A Lincoln Navigator, for example, a popular large SUV for livery services, achieves around 18 MPG combined with its V6, barely edging out the XTS Hearse, but offering significantly more passenger and cargo volume. Comparable Lexus cars, which are sometimes used for livery, often perform significantly better. A Lexus ES 350, for example, easily reaches 26 MPG combined, highlighting the efficiency advantages of a modern sedan, or even a hybrid. While those vehicles are vastly different in purpose, the XTS MPG across all years, and the fact that it struggles to match other vehicles just highlights the XTS hearse as its own specific and unique category.

Tips to maximize efficiency

Because the 2019 Cadillac XTS Hearse is a specialist vehicle used almost exclusively in commercial settings, maximizing efficiency depends heavily on how the vehicles are maintained. Stick religiously to Cadillac’s recommended maintenance schedule, paying close attention to air filter replacement and spark plug condition. A well-maintained engine runs more efficiently and burns fuel more completely.

Tire pressure is another easy win. Ensure that tires are inflated to the recommended pressure, found on the doorjamb sticker. Underinflated tires increase rolling resistance, forcing the engine to work harder and using more fuel. Correct tire pressure improves handling and extends tire life as well.

Avoid excessive idling. Modern engines are remarkably efficient at starting and restarting, so turning the engine off during extended stops can save fuel. This is particularly relevant during funeral services or when waiting in processions.

Aggressive driving uses extra fuel. While it may be tempting to accelerate quickly or brake hard, doing so wastes fuel. Gentle acceleration and smooth braking are much more fuel-efficient driving practices that are also befitting the nature of the vehicle.

Consider the weight carried in the vehicle, but only where practical. Remove any unnecessary equipment or materials from the hearse to minimize weight. This is particularly important for maximizing fuel economy on longer trips. Funeral home directors should evaluate which standard equipment is always necessary, and which can, on occasion be left out, to improve overall gas mileage. Considering all Cadillac fuel economy data, there are few vehicles that can do what this specialty Hearse does with such grace. Its owners understand that niche, and have come to terms with its fuel economy reality.