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What Oil Viscosity Grade Should Be Used in Summer?

1 Answers
OAaron
07/29/25 9:15pm
In summer, it is recommended to use engine oil with viscosity grades of 10W40 or 10W30. While ensuring proper lubrication, choose oil with the smallest possible viscosity based on the temperature range during usage, engine temperature, and actual vehicle condition. The number before the W in oil grade represents cold start performance - the smaller the number, the better the oil's low-temperature fluidity. The number after W indicates the oil's kinematic viscosity - the higher the value, the greater the viscosity. Engine oil consists of base oil and additives, serving the following functions: 1. Reducing friction and high temperatures; 2. Cooling and temperature reduction; 3. Cleaning; 4. Shock absorption; 5. Rust and corrosion prevention.
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What Causes the Water Temperature Warning Light to Illuminate While Driving?

The reason the water temperature warning light illuminates while driving is: the water temperature is too high. The car's water temperature gauge indicates whether the engine's cooling system is functioning properly, and it consists of a pointer, scale, and the letters 'C' and 'H'. The function of the car's water temperature gauge is to display the temperature of the coolant in the engine's water jacket during operation, with the scale unit in degrees Celsius. When the engine starts, the water temperature gauge should indicate no less than 50 degrees Celsius, and during normal driving, the normal reading should be between 70 and 90 degrees Celsius. If the water temperature is too high, the water temperature warning light will illuminate. The water temperature indicator light is used to alert the temperature of the coolant inside the engine, displaying different effects by color: blue indicates low water temperature, red indicates high water temperature, and no light indicates normal conditions.
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What Causes the Sunroof Rattle in Geely Emgrand?

Geely Emgrand sunroof rattle causes: 1. Debris in the sunroof track; 2. Lack of lubrication; 3. Loose sunroof components. The Geely Emgrand sunroof can be fully opened or just tilted open. This sunroof measures 340mm in length and 700mm in width. Opening the sunroof at high speeds can reduce wind noise. When driving at high speeds, opening the sunroof while closing the side windows can effectively prevent the driver from experiencing noise generated by open side windows and side winds hitting the face. The Geely Emgrand has a body length of 4632mm, width of 1789mm, height of 1470mm, and a wheelbase of 2650mm. The vehicle's engine delivers a maximum power of 80kW and maximum torque of 142Nm.
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What is the correct method for parking a manual transmission car on a steep slope?

The correct method for parking a manual transmission car on a steep slope: Press the clutch pedal, step on the foot brake to turn off the engine, engage first gear when on an uphill slope or reverse gear when on a downhill slope, pull the handbrake tightly, then slowly release the clutch and foot brake. The method for starting a manual transmission car on a steep slope: When the car starts to move forward, keep the clutch pedal still to allow the car to start smoothly, then slowly release the clutch pedal until it is fully engaged. The hill start assist system can effectively prevent the car from rolling back and make hill starts smoother. For cars equipped with a hill start assist system, when starting on a slope with the handbrake engaged, first press the start assist switch, release the handbrake, press the clutch pedal with the left foot and engage first gear, then slowly release the clutch while stepping on the accelerator pedal with the right foot.
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How often should the battery of Volkswagen Lavida be replaced?

Volkswagen Lavida battery replacement cycle is generally 3-5 years. Introduction to car batteries: Car battery, also known as storage battery, is a type of battery that works by converting chemical energy into electrical energy. Usually, the battery refers to the lead-acid battery. That is, a battery mainly made of lead and its oxides, with sulfuric acid solution as the electrolyte. Precautions for battery replacement: Whether removing or installing, the positive battery terminal must not touch any metal when being twisted. When purchasing a battery, pay attention to ensure it matches the original battery model of the car for normal use. Note to perform a non-power-off replacement to avoid resetting some electronic devices in the car. For non-power-off replacement, first connect the new battery to the vehicle's power supply, then remove the old battery, and finally install the new battery.
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What are the reasons for the non-responsive heating of Volkswagen's rearview mirrors?

Volkswagen rearview mirror heating may not respond due to damaged heating film or faulty wiring. It should be inspected and repaired promptly. The rearview mirror is a tool that allows the driver to directly obtain external information about the rear, side, and lower parts of the car while seated in the driver's seat. Here are detailed introductions about car rearview mirrors: Overview: Car rearview mirrors are located on the left and right sides of the car's front and inside the car's front. The car rearview mirrors reflect the situation behind, to the side, and below the car, allowing the driver to indirectly see these areas, acting as a "second eye" to expand the driver's field of vision. Precautions: Car rearview mirrors are important safety components, and their mirrors, shape, and operation are carefully designed. The quality and installation of rearview mirrors have corresponding industry standards and cannot be altered arbitrarily.
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How to Match the Throttle of Nissan Qashqai?

Nissan Qashqai throttle matching method is: 1. Keep the engine off, turn the ignition switch to the ON position; 2. Wait for 3 seconds, then within 5 seconds quickly and fully press and release the accelerator pedal 5 times, wait for 7 seconds, do not move anything during this period, then fully press the accelerator pedal and hold it steady; 3. Observe the engine warning light on the dashboard, after about 10 seconds it will start flashing and then remain steadily lit, at this point release the accelerator pedal, the matching is complete. The dimensions of the Qashqai are 4315mm in length, 1783mm in width, and 1606mm in height, with a wheelbase of 2630mm. The interior configuration of the vehicle includes a 9-inch high-definition capacitive touchscreen and is equipped with the NissanConnect Nissan Intelligent Mobility system.
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