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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)Scheduled maintenance service
Follow Normal Maintenance Schedule if the vehicle is usually operated where none
of the following conditions apply.
If any of the following conditions apply, follow Maintenance Under Severe Usage
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Components and Components Location
Component Location
1. Slide motor2. Front Height motor3. Rear Height motor4. Recline motor5. Headrest motor6. Cushion extension motor7. Air lumbar support switch8. Air lumbar support pump9. Air l ...
Evaporator Temperature Sensor Repair procedures
Inspection
1.
Turn the ignition switch OFF.
2.
Disconnect the evaporator temperature sensor connector.
3.
Measure the resistance between terminal “+” and “-” of the evaporator temp ...