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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)Oil Pump Description and Operation
Description
The oil pump rotation builds the hydraulic pressure needed
for the lubrication of the various parts of the automatice transmission
and operation of the clutch and brakes.
The oil ...
High mounted stop light
1. Remove the rear seat
5 Seater
1.Disconnect the negative battery cable.
2.Remove the rear seat cushion.
3.Loosen the mounting bolts, then remove the rear seat back.
4.Disconnect the conne ...
Rail Pressure Sensor (RPS) Description and Operation
Description
Rail Pressure Sensor (RPS) is installed on the delivery pipe
and measures the instantaneous fuel pressure in the delivery pipe. The
sensing element (Semiconductor element) built in ...