SP‑111, also referred to as SP‑III (SP‑3), is a type of ATF developed for certain automatic transmissions, most commonly found in older Asian vehicles such as Mitsubishi, Hyundai, and Kia.
The “SP” designation comes from manufacturer specifications, with SP‑III being the third-generation upgrade. It offers improved oxidation stability and better friction performance compared to earlier SP and SP‑II fluids.
SP 111 Transmission Fluid
1. Idemitsu ATF Type HK (SP‑III Compatible)
Key Features:
- Compatible with SP‑III specification transmissions for Hyundai, Kia, and Mitsubishi vehicles.
- Maintains smooth shifting and proper clutch engagement.
- Provides oxidation and wear protection to extend transmission life.
- Available in 1-quart or 5-quart packs for DIY servicing.
- Suitable for vehicles that originally required OEM SP‑III fluid.
Best For: Owners of older Asian vehicles seeking a high-quality aftermarket SP‑III fluid.
2. Genuine Hyundai SP‑III Automatic Transmission Fluid
Key Features:
- Official Hyundai OEM SP‑III ATF.
- Meets factory specifications for compatible vehicles.
- Maintains factory-intended friction characteristics and shift quality.
- Ideal for OEM replacement or regular service intervals.
- Available in 1-quart bottles.
Best For: DIYers and vehicle owners who prefer OEM fluids for exact compatibility with transmissions originally filled with SP‑III.
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3. Valvoline Import Multi-Vehicle ATF (SP‑III Compatible)
Key Features:
- Full synthetic automatic transmission fluid for smooth shifting.
- Compatible with a wide range of import automatic transmissions, including SP‑II and SP‑III vehicles.
- Offers anti-wear and anti-shudder protection.
- Provides thermal stability across different operating temperatures.
- Available in 1-gallon containers for complete fluid changes.
Best For: Users looking for a multi-vehicle ATF that performs well in SP‑III applications and across various automatic transmissions.
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How to Choose the Right SP‑III Fluid
When selecting SP‑III or a compatible fluid, consider the following:
1. Check your owner’s manual: It will list the exact ATF specification required. Using the wrong fluid may affect performance or void warranty coverage.
2. OEM vs. aftermarket: OEM fluids match manufacturer specifications exactly, but are often more expensive. High-quality aftermarket options provide excellent performance and value.
3. Confirm compatibility: Even if a fluid isn’t labeled SP‑III, verify that it is listed as compatible with SP‑III specifications.
4. Consider transmission age and use: Older transmissions may benefit more from OEM fluids, while newer or multi-vehicle applications may work well with multi-vehicle ATFs.
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Why SP‑III Matters
SP‑III (SP‑111) is important because it:
- Maintains exact friction characteristics to prevent slipping, jerking, or shudder during gear changes.
- Provides thermal and oxidation stability, resisting breakdown at high temperatures and extending fluid life.
- Protects seals and transmission components, especially rubber seals and clutch materials used in vehicles requiring SP‑III.
- Reduces internal wear on gears, clutches, and bands, helping the transmission last longer.
Although SP‑III branded fluids can be difficult to find in some markets, many vehicle owners and mechanics rely on equivalent aftermarket or multi-vehicle ATFs that meet or closely match SP‑III specifications.
Final Thoughts
SP‑111 (SP‑III) transmission fluid is essential for keeping compatible automatic transmissions healthy, smooth, and reliable. While OEM SP‑III fluids are the most precise match, high-quality aftermarket fluids such as Idemitsu or Valvoline provide excellent alternatives. Choosing a fluid that matches your vehicle’s requirements ensures proper transmission performance and longevity.
Whether you select Idemitsu SP‑III compatible, Genuine Hyundai SP‑III, or Valvoline Import Multi-Vehicle ATF, make sure it meets the specification for your vehicle and follow your manufacturer’s service recommendations.
