Figure 10.

Area plots of transmission power losses over light-duty vehicles test cycle (WLTC) with three different fluid viscosities (a) hypothetical fluid ${\nu }_{{100}^{°}C}=1$ cSt, (b) original baseline fluid ${\nu }_{{100}^{°}C}=5.9$ cSt and (c) hypothetical fluid ${\nu }_{{100}^{°}C}=10$ cSt. In all cases viscosity index (VI) $=$ 174; initial transmission temperature is 40 °C and ambient temperature is 23 °C; calculations were done for six additional viscosities (not shown here).