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Hyundai Equus: Recommended SAE viscosity number
CAUTION
Always be sure to clean the area around any filler plug, drain plug, or dipstick before checking or draining any lubricant. This is especially important in dusty or sandy areas and when the vehicle is used on unpaved roads. Cleaning the plug and dipstick areas will prevent dirt and grit from entering the engine and other mechanisms that could be damaged.
Engine oil viscosity (thickness) has an effect on fuel economy and cold weather operating (engine start and engine oil flowability). Lower viscosity engine oils can provide better fuel economy and cold weather performance, however, higher viscosity engine oils are required for satisfactory lubrication in hot weather.
Using oils of any viscosity other than those recommended could result in engine damage.
When choosing an oil, consider the range of temperature your vehicle will be operated in before the next oil change. Proceed to select the recommended oil viscosity from the chart.

Recommended lubricants and capacities
Vehicle identification number (VIN)Head Lamps Components and Components Location
Components
1. Head lamp assembly lens & housing2. Ballast3. Head lamp (Low) bulb (HID) & Ignitor4. Bracket5. Dust cover (Low)6. Vertical adjustment (High/Low)7. Head lamp (High) bulb8. Du ...
Air Quality Sensor (AQS) Description and Operation
Desciption
The Air Quality Sensor (AQS) is located at the center support
in front of the engine radiator. It detects hazardous elements in
ambient air providing output signal to the control.
A ...
Ambient Temperature Sensor Repair procedures
Inspection
1.
Turn the ignition switch OFF.
2.
Remove the front bumper.
(Refer to Body - "Front Bumper Cover")
3.
Disconnect ambient temperature sensor.
4.
Check the resistance of the ...