17 MPG combined. That figure isn’t going to win any awards for efficiency. The 2016 Mercedes-Benz AMG SL65 isn’t built for hypermiling; it’s a twelve-cylinder performance car, a roadster that trades fuel sipping for relentless acceleration. Buyers are generally unconcerned about fuel costs, instead focusing on the SL65’s immense power and effortless speed.

City and highway performance

Splitting the EPA’s combined figure, you get 14 MPG in the city and 21 MPG on the highway. The city number reflects the engine’s strong thirst, especially in stop-and-go traffic. The highway figure, while still far from frugal, demonstrates that the SL65 can achieve respectable efficiency when cruising, relatively speaking. The seven-speed automatic transmission plays a critical role here, keeping the engine in its most efficient range when possible. But step on the gas to access even a fraction of the available 621 horsepower, and those numbers plummet. It’s a trade-off AMG buyers understand perfectly well.

Annual fuel cost

The EPA estimates the annual fuel cost for the 2016 Mercedes-Benz AMG SL65 at $3,400. This figure is based on driving 15,000 miles per year and using national average fuel prices. For perspective, that’s roughly equivalent to the cost of a high-end European vacation. The calculation is simple: total miles driven divided by combined MPG, multiplied by the average fuel price. Anyone who regularly pushes the SL65 will likely see fuel costs significantly exceed this estimate. Buyers considering a vehicle with this level of performance rarely make fuel costs a primary concern.

Real-world expectations

Don’t expect to consistently match the EPA’s figures. The AMG SL65 encourages spirited driving, and consistent aggressive acceleration will bring your real-world MPG closer to the city rating, or even below. Driving style, traffic conditions, and even tire pressure can drastically impact fuel economy. Owners who primarily use the SL65 for weekend cruises or long road trips may see slightly better numbers, while those who frequently exploit its performance capabilities will pay a price at the pump. AMG owners are paying for the experience, not the MPG.

How it compares

Compared to its competitors, the SL65 falls squarely in the expected range for high-performance roadsters. A 2016 Porsche 911 Turbo S, while significantly more efficient at 22 MPG combined, offers a different driving experience focused on surgical precision rather than raw power. Other competitors like the Aston Martin Vanquish Volante, with a similar V12 engine, offer comparable, or even worse, fuel economy. This comparison matters because potential buyers might cross-shop these vehicles based on performance and prestige. Consider all Mercedes Benz fuel economy data to see where the SL65 sits within the broader Mercedes lineup.

Tips to maximize efficiency

While the SL65 is not designed for fuel efficiency, there are still ways to minimize fuel consumption. Gentle acceleration and anticipation of traffic flow will help you stay out of the turbochargers for longer. Avoid unnecessary idling, especially when the engine is cold; even a few minutes of idling can burn a surprising amount of fuel.

Proper tire inflation is critical for both performance and efficiency. Check your tire pressures regularly and maintain them at the manufacturer’s recommended levels. Underinflated tires create more rolling resistance, reducing fuel economy and negatively impacting handling. This is even more important on a high-performance vehicle like the SL65.

Use the “Comfort” driving mode when possible, which softens throttle response and optimizes the transmission for efficiency. While this mode won’t transform the SL65 into a Prius, it can help to minimize unnecessary fuel consumption during casual driving. But if you’re wondering about AMG MPG across all years, keep in mind these vehicles are designed to be driven with passion.

Ensure the car is properly maintained with regular servicing. A well-tuned engine and clean air filters contribute to optimal efficiency. Neglecting maintenance can lead to decreased performance and increased fuel consumption. Regular maintenance also protects the vehicle’s longevity.