Idemitsu ATF Type H-Plus automatic transmission fluid, 1 Quart — full synthetic, improved low-temp flow

Idemitsu ATF Type H-Plus is a full-synthetic automatic transmission fluid formulated to deliver smooth gear changes, improved low-temperature flow, and long-lasting protection for automatic and some CVT transmissions.

Designed for passenger cars and light trucks that specify Type H fluids, Idemitsu ATF Type H-Plus blends advanced base stocks with friction modifiers and anti-wear additives to maintain transmission cleanliness and stability under heat and stress. Its chemistry focuses on consistent friction characteristics for reliable shift quality, oxidation resistance for extended fluid life, and low-viscosity behavior that helps performance in cold starts.

How does Idemitsu ATF Type H-Plus affect shifting performance?

The formulation delivers predictable frictional behavior so shifts are smoother and less likely to produce shift shock or chatter. Improved anti-shudder properties help prevent transmission judder during torque converter lockup, preserving comfort and component life.

• Precisely engineered friction modifiers for consistent engagement
• Anti-shudder additives to reduce torque converter judder
• Stable viscosity to maintain shift timing across temperatures

Will this fluid protect my transmission long-term?

Idemitsu ATF Type H-Plus contains oxidation and thermal stabilizers that slow fluid breakdown, helping maintain protective properties over extended service intervals. Anti-wear and detergency additives work together to reduce gear and bearing wear while preventing sludge and varnish buildup.

• Advanced anti-wear agents to reduce metal-to-metal wear
• Oxidation resistance for longer fluid life under high temperatures
• Detergents and dispersants to keep internal parts clean

Is this fluid suitable for cold-weather or frequent stop-and-go use?

The low-temperature flow characteristics improve pumpability and shift quality during cold starts, while the product’s thermal resilience suits stop-and-go urban driving. That combination helps transmissions engage smoothly in a range of climates and driving conditions.

• Enhanced low-temperature flow for quicker oil circulation
• Viscosity control to resist thinning during extended city driving
• Formulated to keep hydraulic circuits responsive when cold

How do I know if Type H-Plus is right for my vehicle?

Always check your owner’s manual or factory fill specifications to confirm compatibility with Type H fluids. If your transmission calls for ATF Type H (or the manufacturer authorizes compatible synthetic Type H replacements), this product can be used as a direct fill or service refill by professional technicians.

• Compare vehicle-spec requirements before purchasing
• Suitable for many passenger cars and light trucks specifying Type H
• Professional fluid change recommended for best results

Who is this for: Idemitsu ATF Type H-Plus is aimed at owners and service shops seeking a synthetic Type H automatic transmission fluid that balances smooth shifting, low-temperature performance, and long-term protection. Ideal for drivers in mixed climates, fleet maintenance programs, and anyone replacing or topping up ATF where Type H compatibility is required.