ATF Type H Plus Automatic Transmission Fluid (30040090-75000C020) by Idemitsu®. Oil Type: ATF Type H Plus. Volume: 1 Quart. Quantity: 1 Bottle. Engineered for and meets the requirements of Honda Automatic Transmission with DW-1 and Z-1 specifications. Idemitsu is the only global authorized supplier for DW-1 transmission fluids. Idemitsu has a rich history of developing products alongside leading original equipment manufacturers (OEMs) from project onset, and today is a specialist in low-viscosity, fuel-saving lubrication solutions. From engine oil to automatic and continuously variable transmission fluid, power steering fluid to PAG A/C compressor oil, Idemitsu has you covered with lubricants the OEMs trust.