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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)Radiator Grill Repair procedures
Replacement
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Put on gloves to protect your hands.
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When prying with a flat-tip screwdriver, wrap it with
protective tape, and apply p ...
Fuel Pressure Control Valve Repair procedures
Inspection
1.
Turn the ignition switch OFF and disconnect the battery negative (-) cable.
2.
Disconnect the fuel pressure regulator valve connector.
3.
Measure resistance between the fuel ...
ON/OFF Solenoid Valve Description and Operation
Description
ON/OFF solenoid valve is attached to the valve body and is an on/off solenoid valve that is used to change gears. ...