Two engine options shape the oil you should use: the 2.0-liter naturally aspirated engine requires 5W-20 synthetic oil, while the 1.6-liter turbocharged engine uses 5W-30 synthetic oil. Always choose a full synthetic oil that meets Kia’s specifications and follow the maintenance schedule in your owner's manual.
This article explains, in detail, how the oil specification varies by engine in the 2021 Kia Seltos and provides practical guidance for selecting the right lubricant and maintaining it properly.
Engine options and oil specifications
2.0-liter naturally aspirated engine
For the 2.0L engine, the following oil specifications apply:
- Viscosity: 5W-20
- Oil type: Synthetic (full synthetic)
- Notes: Use oil that meets Kia’s service specifications and adhere to the recommended change intervals in the owner’s manual.
In summary, the 2.0L Seltos calls for 5W-20 synthetic oil under normal operating conditions.
1.6-liter turbocharged engine
For the 1.6L turbo engine, the following oil specifications apply:
- Viscosity: 5W-30
- Oil type: Synthetic (full synthetic)
- Notes: Use oil that meets Kia’s service specifications and follow the maintenance schedule outlined in the owner’s manual.
In summary, the turbocharged 1.6L Seltos uses 5W-30 synthetic oil.
Climate considerations and maintenance tips
Oil viscosity recommendations are generally standardized, but climate and driving conditions can influence performance and longevity. When in doubt, consult the owner’s manual or contact a Kia dealership to confirm the exact specification for your vehicle’s engine, VIN, and regional requirements. Regular oil changes with the correct synthetic grade help protect engine wear and maintain fuel efficiency.
Summary
The 2021 Kia Seltos uses different oil viscosities depending on the engine: 5W-20 synthetic for the 2.0-liter naturally aspirated engine, and 5W-30 synthetic for the 1.6-liter turbocharged engine. Always verify the exact specification in the owner’s manual for your vehicle and follow the recommended maintenance intervals.