Honda HCF-2 CVT Transmission Fluid Suitable for all Honda New Model Car with CVT Gear Box CVT Fluid – Gen. 2 (HCF-2 fluid) Honda HCF-2 Transmission Fluid, the second generation of Honda CVT fluid, is used specifically in Honda vehicles with second-generation Continuously Variable Transmissions (CVT). Instead of using fixed gear ratios like in a conventional transmission, the CVT varies ratios continuously based on engine speed, vehicle speed, and other driving conditions.