2009 Lexus GX 470 Owners Manual - Page 336

4-3. Do-it-yourself maintenance NOTICE n If the fluid level is low or high It is normal for the brake fluid level to go down slightly as the brake pads wear or when the fluid level in the accumulator is high. If the reservoir needs frequent refilling, it may indicate a serious problem. Power steering fluid n Fluid level The fluid level should be within the appropriate range. Full (when cold) Add fluid (when cold) Full (when hot) Add fluid (when hot) Hot: The vehicles has been driven around 50 mph (80 km/h) for 20 minutes, or slightly longer in frigid temperatures. (Fluid temperature, 140°F - 175°F [60°C - 80°C]). Cold: The engine has not been run for about 5 hours. (Room temperature, 50°F - 85°F [10°C - 30°C]). 340