The 2018 Kia Optima with the 2.4 L engine takes about 5 quarts of engine oil for a full change when you replace the oil filter. This is the typical capacity you should plan for; always confirm by checking the dipstick and the owner's manual.
What to know about the oil capacity
Understanding the engine’s oil capacity helps with maintenance planning and ensuring you have the right amount on hand. The figures below reflect standard specifications for the 2.4 L engine used in Optimas from this period.
Capacity specifics
Before listing the exact figures, note that total capacity can vary slightly depending on whether the filter is replaced during the oil change. The most commonly cited values are:
- With oil filter: 5.0 quarts (approximately 4.7 L)
- Without oil filter: about 4.7 quarts
Concluding: For a typical oil change with a new filter, plan on roughly 5 quarts of oil. After adding the oil, start the engine and verify the level with the dipstick, topping up if necessary to reach the full mark.
Oil grade and maintenance recommendations
Along with capacity, using the correct oil grade and following the maintenance schedule helps sustain engine performance and longevity. The guidelines below apply to the 2018 Optima 2.4 L in most conditions.
Before the list: The following details summarize the recommended oil grade and change intervals for this engine.
- Viscosity: 5W-20 (with some climates or conditions, 5W-30 may be acceptable per the manual)
- Recommended oil: synthetic blend or full synthetic, as advised by Kia
- Change interval: about every 7,500 miles under normal driving; more frequent under severe conditions (short trips, extreme temperatures, heavy city driving)
Concluding: Use the oil grade and change interval specified in the owner's manual and keep to the recommended maintenance schedule for optimal engine life.
Summary
In brief, the 2018 Kia Optima’s 2.4 L engine typically takes about 5 quarts of engine oil with a filter for a standard oil change. Verify the exact amount by checking the dipstick after filling, and consult the owner's manual for the precise oil grade and maintenance intervals.