The 2018 Hyundai Sonata oil type and capacity iS5w-30 or 5w-20 and 4.8 quarts for the 1.6 L 4Cylinder engine. Having high quality oil is important for the engine to run smoothly. You will run into problems with the oil at some point. Old or bad oil can cause the engine to stop working. Knocking noise may come about from the engine. You could experience terrible gas mileage. A common problem is an awful burning odor. This needs to be viewed closely as soon as possible or the car might explode. Your oil needs to be changed out someday. Every 5,000 to 10,000 miles or so is a good rule of thumb. If You don't replace it, there will be problems with the engine.
Pat T.
January 2, 2020
The 2018 Hyundai Sonata uses synthetic blend oil, either SAE 5W-30 or 5W-20. The 1.6L 4 -cylinder engine prefers 5W-30, and can hold 4.8 quarts. The 2.0L 4 cylinder prefers 5W-20 and has the capacity for 4.3 quarts. The 2.4L 4 cylinder can use either 5W-30 or 20 and can hold 5.1 quarts.
A.B.
August 11, 2020
I would check your owners manual.
Ron
June 8, 2022
2018 Sonata does not use synthetic oil. They use 5w 20 Standard Oil.
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