If your owner’s manual lists SP-IV, you should always match that specification. The correct fluid ensures proper torque converter clutch operation, stable viscosity across extreme temperatures, and reliable long-term performance.
OEM formulations and high-quality aftermarket equivalents are widely available.
SP 4 Transmission Fluid
1) Genuine Hyundai / Kia SP-IV Automatic Transmission Fluid
Best OEM choice
Features:
- Exact fluid formulation recommended for Hyundai and Kia models
- Provides factory-level shift quality and torque converter clutch control
- Fully synthetic for maximum temperature and oxidation resistance
- Excellent for long-term transmission protection
- Ideal for any driver who wants the safest, most exact factory match
2) AISIN ATF SP-IV
Top aftermarket OE-grade option
Features:
- Formulated by Aisin, a major OEM transmission manufacturer
- Designed specifically for Asian transmissions requiring SP-IV
- Delivers smooth shifting and excellent low-temperature performance
- Offers consistent viscosity and friction characteristics
- Often available in both single bottles and multi-pack bundles
3) Mopar SP-IV Automatic Transmission Fluid
OEM-approved option for certain Chrysler/Jeep models
Features:
- Manufactured to meet Mopar requirements for transmissions calling for SP-IV
- Helps maintain compatible friction behavior in electronically controlled automatics
- Fully synthetic, thermally stable formulation
- A good option if your Dodge, Jeep, or Chrysler vehicle lists SP-IV in the manual
- Ensures long-term durability under heavy loads or high heat
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4) ENEOS Import ATF SP-IV / SP-Plus
High-quality Japanese aftermarket formulation
Features:
- Designed for import vehicles requiring SP-IV or SP-Plus specifications
- Produced by one of Japan’s leading lubricant manufacturers
- Offers excellent oxidation control for extended service intervals
- Provides smooth, consistent shifts even under demanding conditions
- Good choice for drivers seeking a premium non-OEM alternative
5) Aftermarket SP-IV Multi-Pack Kits
Budget-friendly multi-quart options
Features:
- Generic OE-equivalent formulations designed to meet SP-IV requirements
- Great value for drain-and-fill or repeated service intervals
- Typically sold in 4-pack, 6-pack, or larger quantities
- Useful for shops, DIY enthusiasts, or fleets
- Always verify labeling to ensure it clearly states SP-IV compatibility
What SP-IV Transmission Fluid Is
SP-IV is the factory-specified automatic transmission fluid for a wide range of Hyundai and Kia vehicles equipped with 6-speed and many 8-speed automatic transmissions. It’s designed for:
- Low-temperature flow during cold starts
- Stable viscosity at high temperatures
- Smooth, shudder-free shifting
- Proper friction behavior for clutch packs
- High oxidation resistance for extended service life
This fluid is not interchangeable with older SP-II, SP-III, or standard ATF formulations. SP-IV uses a more advanced synthetic base and more tightly controlled friction modifiers. Always follow the spec listed in your manual.
Related Ford Transmission Fluid Chart(For All Models)
How to Choose an SP-IV Transmission Fluid
1. Match the specification
Always look for “SP-IV,” “SP-4,” “ATF SP-IV,” or an OEM part number equivalent. This ensures correct performance and compatibility.
2. OEM vs. aftermarket
OEM-branded fluids from Hyundai, Kia, and Mopar match factory requirements exactly. Trusted aftermarket brands such as Aisin and ENEOS also produce SP-IV formulations that meet or exceed OE performance.
3. Choose the right quantity
Most bottles come in 1-quart containers. Drain-and-fill services often require 4–5 quarts, while a full overhaul or cooler flush may need more. Always verify your vehicle’s specific capacity.
4. Seller reputation
If buying on online marketplaces, check reviews, packaging details, and whether the product is genuine or a high-quality equivalent.
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FAQs
What is SP-4 transmission fluid?
SP-4, also called SP-IV, is a fully synthetic automatic transmission fluid designed for modern Hyundai, Kia, and some Mopar vehicles. It provides precise friction characteristics, smooth shifting, and high-temperature protection for multi-speed automatic transmissions.
Is Dexron VI compatible with SP-IV?
No. Dexron VI is a GM specification fluid and does not meet the specific friction and performance requirements of SP-IV. Using Dexron VI in a transmission that requires SP-IV can lead to harsh shifting and potential long-term damage.
What transmission fluid replaces Mercon SP?
Mercon SP is an older Ford automatic transmission fluid specification. Modern fluids such as Mercon LV or Mercon V can sometimes serve as replacements, but it’s essential to check the owner’s manual for the exact model and year to ensure compatibility.
What is ATF+4 compatible with?
ATF+4 is Chrysler’s automatic transmission fluid specification. It is compatible with vehicles requiring ATF+4 and may be used in some applications calling for SP-IV equivalents, but only if the manufacturer explicitly lists it as compatible.
Does Mercon LV replace SP?
Mercon LV is a low-viscosity Ford automatic transmission fluid designed for newer 6- and 10-speed transmissions. It does not directly replace SP-IV, which is specific to Hyundai/Kia and some Mopar transmissions, unless the vehicle manufacturer explicitly allows it.
What is 4 SP automatic?
“4 SP automatic” typically refers to a 4-speed automatic transmission that requires SP-IV (SP-4) fluid. The “4 SP” designation indicates both the transmission type (4-speed) and the required fluid specification (SP).
Final Thoughts
SP-IV transmission fluid is a precision-engineered lubricant designed for modern Hyundai, Kia, Mopar, and select import transmissions. Using the correct fluid ensures smoother shifts, less wear, and long-term reliability. Whether you prefer OEM or high-quality aftermarket options, several excellent choices are available, including Genuine Hyundai/Kia, Aisin, Mopar, ENEOS, and multi-pack OE-equivalent kits.
