The 2015 Infiniti Q50 is a powerful and luxurious four-door sedan fit for any driver—and it’ll keep you comfy on the road for plenty of years as long as you take care of its engine with regular oil changes. You’ll need 5.2 quarts for every oil change.

Even if you’re driving an older model of a luxury vehicle, the maintenance costs are no walk in the park. If you’re cruising around in a 2015 Infiniti Q50, you’ll probably want to

cut back on your car expenses

where you can. A good place to start? Changing your own oil.

Your owner’s manual will have all the information you need to do this, but in case you lost your manual or would rather read the Q50’s oil details online, you’re in the right spot. We’re here to cover exactly how much oil you’ll need, what kind you need, and how to change it yourself.

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2015 Infiniti Q50 engine oil capacity

Let’s get to the point: the 2015 Infiniti Q50’s 3.7-liter six-cylinder engine holds 5.2 quarts of oil including the filter.

It’s essential you don’t mix up the engine’s 3.7-liter displacement—or the volume the cylinders take up—with its oil capacity, which is how much oil your car will need at each oil change.

What kind of oil does a 2015 Infiniti Q50 need?

Yep—there are different kinds of oil. In fact, there are dozens of different oil types, and the type suggested by your

Infiniti’s owner’s manual

is SAE 5W-30 full synthetic oil.

You don’t have to know what those numbers and letters mean to buy the right oil—but if you’re curious, they refer to the temperature and viscosity requirements for the oil. The 5 in this oil tells you the viscosity level in winter, signified by the W, while the 30 tells you the viscosity in hot temperatures. SAE just means the oil’s code was certified by the Society of Automotive Engineers.

Making sure your engine gets the right type of oil is essential in keeping your engine healthy and running smoothly. The correct oil at the right oil change intervals can go a long way in preventing wear and tear to your Infiniti.

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How often to change the oil on a 2015 Infiniti Q50

Since you’re using synthetic oil, you can probably go around 7,500 to 10,000 miles between oil changes. Even so, you should plan to check your oil more frequently than that. In fact, it’s a good idea to check your oil level and quality around once a month. Keep an eye out for the following signs that your oil is ready for a change:

The oil is dark brown or black (as opposed to light brown or amber for clean oil)

It has a gritty or coarse texture

You notice

unfamiliar sounds from the engine

You’re smelling unfamiliar scents, like oil, smoke, or burning

Your Q50 isn’t performing as well as it usually does

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How to change your oil and oil filter

Once you’ve assessed that your Infiniti does indeed need an oil change, it’s time to decide whether you want to take it into a quick lube or do it yourself. Getting your oil changed by a professional will cost anywhere between $60 and $180, so it may be worth it to get your hands a little dirty—figuratively speaking, of course, because you’ll want to wear gloves.

If you want to attempt a DIY oil change for your Q50, here’s what you need:

A jack or lifting ramps

10 mm socket

14 mm socket or wrench

30 mm socket extension

Socket drive

Flathead screwdriver

Oil filter wrench

Oil drain pain

Funnel

Torque wrench (optional)

Once you’ve gathered your supplies—including 5.2 quarts of 5W-30 oil and a new oil filter —you’re ready to start. Crank your Q50’s engine and let it run until it reaches its normal operating temperature (around five to 10 minutes). This makes sure your oil is viscous enough to drain well.

When your engine is ready, turn it off, pop the hood, and jack your Q50. Then follow this process:

1. Remove the engine cover by removing the bolts and screws holding it in place. Then pull the cover down to take it off.

2. Remove the oil filler cap.

3. Place your drain pan under the engine, then unscrew the 14 mm bolt to drain the oil.

4. Loosen the oil filter with the filter wrench and let the oil drain from the filter before removing it completely.

5. When the rest of the oil has been totally drained, wipe the area down, then add a bit of the new oil to the gasket of the new oil filter.

6. Install the new filter, making sure you don’t over-tighten.

7. Replace the 14 mm drain plug and tighten it to 35 Nm of torque.

8. Grab your funnel and add your new oil before putting the oil filler cap back on.

Once you finish, check your dipstick to ensure you’ve added the right amount of oil. Then start your engine for a few minutes to check for leaks around the filter and drain bolt. You can also

reset the oil maintenance light

on your dashboard.

Be sure to dispose of the old oil according to your local law. The easiest way to deal with it is to funnel the old oil into the empty new oil jug and take it to a local auto parts store or lube shop and they can take care of it for you.

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