Service and Maintenance. . . 358■ RECOMMENDED FLUIDS AND LUBRICANTSUSAGE FLUID / LUBRICANTEngine Oil To determine the needed oil quality and viscosity for your vehicle's engine, see"Engine Oil" earlier in this section.Engine Coolant 50/50 mixture of clean, drinkable water and use only DEX-COOL® coolant. See"Engine Coolant" earlier in this section.Intercooler System(CTS-V Model Only) 50/50 mixture of clean, drinkable water and use only DEX-COOL® coolant.Hydraulic BrakeSystemDOT 3 Hydraulic Brake Fluid (GM part no. 88862806)Windshield WasherSolvent Optikleen® washer solvent.Hydraulic ClutchSystemDOT 4 Hydraulic clutch fluid (GM part no. 88958860).Power SteeringSystemGM power steering fluid (GM part no. 89021184).Manual Transmission(CTS Model Only)SAE 75W-90-GL5 Gear Oil (GM part no. 88862475).Manual Transmission(CTS-V Model Only)Manual Transmission Fluid (GM part no. 88861800).$10araCTS Page 358 Tuesday, September 15, 2009 12:30 PM
