How Many Quarts of Oil Does a 1989 Mercedes-Benz 560SL Engine Need?
If you’re the proud owner of a 1989 Mercedes-Benz 560SL—or considering buying one—you’re probably interested in keeping it running smoothly. Engine oil changes are among the most basic yet crucial auto maintenance procedures. But not all engines are created equal, and classic cars like the 560SL come with their own unique set of requirements.
So, the big question is: how many quarts of oil does the 1989 Mercedes-Benz 560SL need? Let’s dive into the details.
Overview of the 1989 Mercedes-Benz 560SL
The R107 series, which Mercedes-Benz built from 1971 to 1989, includes the 560SL. An famous era of vintage roadsters came to an end with the 1989 model year. The 560SL was powered by a 5.6-liter V8 engine (engine code M117.968), which delivered a respectable 227 horsepower and 279 lb-ft of torque.
This engine is a workhorse that was built to be both powerful and durable—but like any internal combustion engine, it relies heavily on oil to reduce friction, cool internal components, and keep everything running smoothly.
How Much Oil Does the 560SL Engine Hold?
The 1989 Mercedes-Benz 560SL engine takes approximately 8 quarts (7.6 liters) of engine oil when including the oil filter. That’s significantly more than many modern cars, which typically take anywhere from 4 to 6 quarts.
Here’s a breakdown:
- Oil capacity (with filter): ~8.0 quarts (7.6 liters)
- Oil capacity (without filter): ~7.4 quarts (7.0 liters)
It’s always a good idea to check your oil level using the dipstick after refilling, and top off as necessary.
Recommended Oil Type
Mercedes-Benz recommends high-quality oil that matches the specifications of the M117 engine. Since oil technology has advanced significantly since 1989, many enthusiasts now opt for synthetic oils for better protection and performance.
Here are a few commonly used oil types for the 560SL:
- 10W-40 or 15W-40 (conventional or synthetic blend) – Suitable for warmer climates
- 5W-40 full synthetic – Offers better cold-start protection and modern additive packages
It’s important to check your climate and driving conditions to choose the most appropriate viscosity. For a car like the 560SL, especially if it’s driven less frequently or stored seasonally, synthetic oil can offer longer-lasting protection.
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Why Oil Capacity Matters
Using the correct amount of oil isn’t just about avoiding engine wear—it also plays a critical role in:
- Cooling: Oil helps transfer heat away from engine parts.
- Lubrication: stops the early wear caused by metal-on-metal contact.
- Engine longevity: Regular oil changes with the correct quantity and quality of oil can significantly extend the life of your engine.
Severe damage and overheating might result from using too little oil. Too much oil, on the other hand, can cause foaming, poor lubrication, and increased pressure on seals and gaskets.
How Often Should You Change the Oil?
For a classic like the 560SL, it’s advisable to change the oil every 3,000 miles or once a year, whichever comes first—especially if you’re using conventional oil. If you’re using a high-quality synthetic oil, you might stretch that to 5,000 miles, but for older engines, it’s often better to err on the side of caution.
And don’t forget to change the oil filter with every oil change!
Final Thoughts
Maintaining your 1989 Mercedes-Benz 560SL means paying attention to details like oil capacity and quality. The M117 V8 engine in the 560SL requires around 8 quarts of oil, including the filter. Whether you’re doing the oil change yourself or taking it to a professional, knowing the right specifications ensures your classic roadster stays in top condition.
Taking the time to care for your 560SL properly not only keeps it running better—it also preserves its value and your driving enjoyment for years to come.