Recommended Lubricants and Capacities for Kia K4

Contents:

• Recommended SAE Viscosity (Thickness) Number

To help achieve proper engine and powertrain performance, maximum fuel efficiency, and long-term mechanical durability for your vehicle, use only the explicitly correct lubricants. Selecting the right fluids for your Kia K4 also promotes optimal engine thermal efficiency, which directly improves fuel economy and reduces emissions. Always ensure the following certified high-grade lubricants and technical fluids are utilized during your Kia K4 routine maintenance cycles:

Fluid / Lubricant Type		Fill Capacity (Volume)	Industry Standard / Classification
Engine Oil (Complete drain and oil filter refill volume)	Smartstream G2.0 Engine	4.5 US qt. (4.3 L)	Full Synthetic SAE 0W-20 formulation meeting API SN PLUS / SP or ILSAC GF-6 quality standards
	Smartstream G1.6 T-GDi Turbo Engine	5.07 US qt. (4.8 L)
Automatic Transmission (AT) Fluid		6.87 US qt. (6.5 L)	SK ATF SP4M-1, MICHANG ATF SP4M-1, S-OIL ATF SP4M-1, or Genuine Kia ATF SP4M-1 factory fluid
Intelligent Variable Transmission (IVT) Fluid		6.87 US qt. (6.5 L)	MICHANG SP-CVT1 or Genuine Kia ATF SP-CVT1 transmission fluid
Engine Coolant / Antifreeze Mix	Smartstream G2.0 Engine	6.34 US qt. (6.0 L)	High-quality phosphate-based, ethylene glycol-based coolant designed for aluminum radiators
	Smartstream G1.6 T-GDi Turbo Engine	7.6 US qt. (7.2 L)
Hydraulic Brake Fluid		As required to fill system	SAE J1704 DOT-4 LV, ISO4925 CLASS-6, or FMVSS116 DOT-4 specifications
Fuel Tank Total Capacity		12.41 US gal. (47 L)	Unleaded Gasoline (Regular Octane or higher recommended)

Transmission Fluid Warning: Use only the specified genuine automatic or variable transmission fluid engineered for your Kia K4. Utilizing a non-specified or unapproved transmission fluid—even if the packaging claims compatibility with genuine factory products—could result in critical shift quality deterioration, severe driveline vibration, and eventual mechanical transmission failure. For factory service schedules, refer directly to the detailed explanation of scheduled maintenance items.

Cooling System Warning: Utilizing non-specified coolant variants, unapproved mixtures, or plain tap water can lead to internal system corrosion, mineral scaling, and potential damage to complex powertrain electrical elements or sensor modules inside the Kia K4.

Recommended SAE Viscosity (Thickness) Number

CRITICAL MAINTENANCE NOTES FOR THE KIA K4 OWNER:

• Contamination Prevention: Always thoroughly clean the physical area surrounding any filler neck, oil cap, drain plug, or oil dipstick before you check fluid levels or drain any old lubricant. This is especially vital when operating your Kia K4 in dusty, muddy, or sandy environments, or when regularly driving on unpaved roads. Proper localized cleaning prevents external dirt, sand, and grit particles from contaminating internal mechanics.
• Aftermarket Engine Additives: Never add aftermarket chemical additives or engine treatments to your engine oil. Factory-specified motor oils are completely balanced. Supplemental additives can unpredictably alter the chemical properties of the engine oil, leading to accelerated wear or catastrophic mechanical engine failure.

Engine oil viscosity directly impacts overall fuel economy metrics as well as extreme cold weather operation, including cold starting and rapid oil flow synchronization upon ignition. Lower viscosity engine oils (such as the recommended 0W-20) are engineered to reduce friction, providing superior fuel economy and rapid protection in freezing climates. Conversely, higher viscosity oils can offer structural lubrication film stability required under extreme load conditions in hot weather environments.

Using motor oils that deviate from the recommended viscosity and specification baselines can trigger internal friction anomalies and irreversible engine component degradation over time.

When selecting a replacement oil for your Kia K4, always evaluate the ambient temperature ranges your vehicle will operate in before the next scheduled maintenance interval. Select the certified oil weight variant according to the technical evaluation guidelines below.

Temperature Range Reference Chart for Approved SAE Viscosity Numbers

Applicable Powertrains: Smartstream G1.6 T-GDi Turbo & Smartstream G2.0 Naturally Aspirated Engines

The American Petroleum Institute (API) Certification Mark and Starburst symbol denote specific motor oils that strictly conform to the International Lubricant Specification Advisory Committee (ILSAC) testing protocols. To maintain your Kia K4 factory warranty parameters and achieve maximum efficiency, you should exclusively use high-grade engine oils that carry this official API Certification Mark on the physical container container.