Gulf HT Fluid C4 sae 10w (210L) series are specially designed for heavy duty automatic and powershift transmissions on off-highway equipment used in earthmoving, mining logging, road transport and agricultural applications and requiring Allison C-4 quality fluids. These oils are blended from highly refined base oils and proven performance additives to provide enhanced wear protection, thermo-oxidative stability, frictional characteristics and rust & corrosion protection. These oils are tested and evaluated in accordance with the Allison C4 Automatic Transmission Fluid Specification (TES-228) and offer satisfactory performance when used in most Allison C4 transmissions.