The type of oil You should use on Your 2002 Hyundai Sonata depends on the type of climate You're living in. If You're living in an area where it's very hot (32F or higher) then You can use SAE 20W-40, or 20W-50. If it's at a normal temperature where You're at, then You can use SAE 10W-30 10W-40, or 10W-50. If it happens to be cold (below 100F) then You should use SAE 5W-30 or 5W-40. The capacity on the 2.4L engine iS4.2 quarts without a filter and 4.5 quarts with a filter. If You want to know the capacity on the 2.7L, it iS4.45 quarts without a filter and 4.77 quarts with a filter.
John A.
January 2, 2020
The base 2.4L inline-4 engine in the 2002 Hyundai Sonata uses 4.5 quarts of 5W30 or 5W40 (below 95 F) 10W30, 10W40, or 10W50 (above -9 F) or 20W40 or 20W50 (above 32 F) synthetic oil. The optional 3.7L V6 engine in the 2002 Hyundai Sonata uses 4.8 quarts of 5W30 or 5W40 (below 95 F) 10W30, 10W40, or 10W50 (above -9 F) or 20W40 or 20W50 (above 32 F) synthetic oil. The viscosities are based on your local weather.
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