Idemitsu Lubricants Automatic Transmission Fluid

Why Idemitsu Lubricants Is the Gold Standard for Automatic Transmission Fluid

When it comes to automatic transmission fluid, few names carry the same weight as Idemitsu Lubricants. As the factory-fill ATF supplier to the majority of Asian import vehicles sold in North America, Idemitsu doesn't just meet OEM specifications — in many cases, it helped write them. That distinction matters enormously when you're shopping for a fluid to protect one of the most complex and expensive components in your vehicle.

OEM-Engineered, Vehicle-Specific Formulas

Idemitsu's approach to automatic transmission fluid stands apart from the "one-size-fits-all" philosophy of multi-vehicle ATFs. Their ATF formulations are exclusively designed to meet the needs of specific leading Japanese vehicle transmission applications, with each formula uniquely engineered for the correct viscosity, oxidation prevention, friction durability, aeration control, and wear protection for that particular application.

Modern transmissions with smaller clutch packs and reduced clutch plate surfaces demand fluids that strike a precise balance of frictional properties. Idemitsu achieves this through advanced friction modifier additive chemistry, ensuring the right coefficient of friction for proper heat transfer, wear protection, and torque converter lockup clutch compatibility to prevent shudder.

Key Product Lines

• ATF Type TLS — Engineered for Toyota, Lexus, and Scion automatic transmissions requiring T-IV specification fluid. Features precisely engineered frictional characteristics for smooth shifting and outstanding anti-shudder performance, along with superior resistance to oxidation and thermal breakdown.
• ATF Type TLS-LV — Formulated for Toyota, Lexus, and Scion automatics specifying ATF WS. Optimized viscosity and advanced friction-reducing additive technology deliver exceptional fuel economy performance alongside long fluid life.
• ATF Type H Plus — Designed for Honda vehicles equipped with automatic (non-CVT) transmissions requiring ATF Z1 or DW-1 fluid. Meets Honda's DW-1 and Z-1 specifications for OEM-level protection.
• ATF Type S — Covers Nissan and Infiniti automatic transmissions meeting Matic-S, Matic-J, and Matic-D specifications, providing excellent anti-shudder performance and smooth shifting.

What Sets Idemitsu ATF Apart

Since an ATF touches virtually every internal component in a transmission, material compatibility is critical. Idemitsu provides the assurance that each of its ATF formulations has been evaluated and approved for internal material compatibility — meaning seals, gaskets, bearings, and friction plates are all considered in the engineering process. Seal compatibility and conditioning properties reduce the risk of fluid leaks caused by seal shrinkage, hardening, and cracking over time.

Advanced anti-wear technology protects gears and bearings, while superior deposit control keeps the transmission free of sludge and varnish buildup. For owners of Japanese-brand vehicles, using an Idemitsu ATF means matching the same engineering philosophy that went into building the transmission itself.