The 2018 GMC Sierra is a capable and endlessly adaptable full-size pickup with a variety of powerful powertrain options. If you want to keep this strong engine operating smoothly, you need to be aware of its oil capacity, which is 8 quarts!

The life of your car can be easily prolonged with simple, routine maintenance like oil changes. To save some of your time and money, you should know your GMC Sierra’s oil capacity and what type to use so you can get this job done at home.

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2018 GMC Sierra engine oil capacity

Let's begin with outlining the correct oil capacity for your 2018 GMC Sierra.

The 2018 GMC Sierra is powered by a 285-hp 4.3-liter V6 engine with an 8-quart oil capacity. Keep in mind that the 4.3 liters in the engine description refers to the engine's displacement, not the amount of oil it can hold.

An engine's displacement is the entire volume of air and fuel swept into a single cylinder, while oil capacity is the amount of oil required to keep the engine's components lubricated and running properly. Don't mix up the two, otherwise, you'll underfill your engine, which could result in long-term damage!

What kind of oil does a 2018 GMC Sierra need?

Now that we know your 2018 GMC Sierra's oil capacity, we can determine the appropriate oil for your vehicle. The ideal oil to use is SAE 5W-30; this is the oil that GMC recommends, and it is advisable to stick with what the manufacturer recommends whenever possible.

The 5 in front of the "W" (which stands for winter) denotes that this oil blend is designed to keep flowing quickly even when temperatures are low. The number 30 following the "W" denotes the thickness of the oil at the normal operating temperature of the engine.

If you’re not sure where to start, here are some specific suggestions for GMC Sierra engine oils:

Castrol EDGE® 5W-30 Full Synthetic Motor Oil

Mobil 1 Truck & SUV 5W-30 Full Synthetic Motor Oil

Valvoline Advanced Full Synthetic SAE 5W-30 Motor Oil

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How often to change the oil on a 2018 GMC Sierra

We've already discussed how much and what type of oil you'll require; now it's time for the actual oil change!

Because the synthetic blend protects the engine better, GMC says that the oil should be changed every 3,500 to 5,000 miles. No matter how often or how many miles you drive, you still need to change your oil every six months to keep it from turning into sludge.

Keep an eye on your oil levels and change them when you need to to make your car last longer and avoid expensive engine repairs (ideally, once a month). Also, pay attention to these signs that it might be time for an oil change:

The oil has turned a very dark brown, almost black

The oil has become grainy in consistency

As you drive, you hear some peculiar engine sounds

Your car emits a smoking or burning odor

You notice any decreases in your car's performance

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How to change your oil and oil filter

Jacks, a socket wrench, a drain pan, a filter wrench, a new filter, and a rag are all needed for the oil change. Grab some 5W-30 motor oil and you're all ready to go!

Before you start, you should let the engine warm up by running the vehicle for a few minutes on a flat surface. After that, open the hood and perform the following steps:

Using jack stands, raise the vehicle so the engine is easily accessible

To drain oil from underneath the motor, remove the plug

Using the filter wrench, remove the used oil filter and set the oil drain to empty

Make sure the area where the new filter will be installed is clean before installing it

Tighten the bolt on the oil drain to 20 lb-ft.

Pour the new oil into the engine and put the fill cap back on

While the engine is running, use the dipstick to verify the oil level and look for any possible leaks to ensure you've completed everything properly. You're all set to go!

Finally, make sure to properly dispose of your used engine oil. Because it is a hazardous material, you cannot simply dispose of it anyplace. Many places have drop-off sites for recycling spent oil, and some auto shops and dealerships will take it as well.

Don’t forget regular insurance policy maintenance

That's one less thing to worry about in terms of your 2018 GMC Sierra’s maintenance! And luckily, the

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