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How Often Should Automotive Gear Oil Be Replaced?

2 Answers

DelTaylor

07/28/25 5:36pm

Generally, automotive gear oil should be replaced every 60,000 kilometers to effectively improve the efficiency of gear transmission of engine power. Gear Oil Selection: Viscosity is the most fundamental factor when selecting gear oil for replacement. If the viscosity is too high, it may cause overheating of friction surfaces and unnecessary power loss. If the viscosity is too low, centrifugal force may throw the oil off the gear surfaces, potentially leading to oil seal leaks and insufficient lubrication on gear surfaces. This can result in increased wear or even sintering. Therefore, selecting the appropriate viscosity is crucial. To prevent gear surface scuffing, peeling, or sintering caused by high stress during gear contact, it is essential to choose gear oil with excellent anti-wear and extreme pressure performance to maintain proper load-bearing capacity. Users must avoid adding other oils such as internal combustion engine oil or hydraulic oil into the gearbox, as this may lead to insufficient extreme pressure anti-wear performance and gear damage. Manual Transmission Gear Oil Replacement Method: Start the engine and warm it up to normal operating temperature; locate and unscrew the oil level check plug; remove the transmission gear oil drain plug, drain all the old gear oil, and then tighten the plug; use a gear oil filler to add the specified gear oil into the transmission through the oil level check hole.

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RyderMarie

08/11/25 11:43pm

I just changed the gear oil for my old ride last month. For manual transmission cars, it's recommended to replace it every 50,000 to 60,000 kilometers, while for automatic transmissions, around 40,000 kilometers is more reliable. It mainly depends on how hard you drive. For someone like me who often drives on mountain roads, the transmission wears out faster, so changing it a bit earlier is definitely the right move. Every time I get maintenance done, I ask the mechanic to check the oil color. If it turns soy-sauce-like with metal shavings, it means the wear is severe. Don't delay it. Last time, my friend's car waited until 100,000 kilometers to change the oil, and the entire transmission needed a major overhaul, costing over 8,000 yuan. Remember to ask the mechanic to use the original manufacturer's specialized oil when changing it. Cheap oils from roadside stalls can do more harm to your car.

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What Does Comprehensive Car Insurance Mean?

Comprehensive car insurance includes traffic insurance, vehicle damage insurance, third-party liability insurance, non-deductible insurance, and passenger insurance. Comprehensive car insurance covers: 1. Traffic Insurance: Officially known as Compulsory Traffic Accident Liability Insurance, this is a mandatory liability insurance where the insurer compensates for personal injuries, deaths, and property losses of victims (excluding cyclists and the insured) in road accidents involving the insured vehicle, within the liability limits. 2. Third-Party Liability Insurance (TPL): Officially known as Commercial Third-Party Liability Insurance, it covers compensation amounts the insured is legally liable to pay for accidental injuries, deaths, or direct property losses to third parties caused by an authorized driver using the insured vehicle, as per the insurance contract. 3. Vehicle Damage Insurance: This commercial insurance covers damage to the insured vehicle caused by accidents while driven by the insured or an authorized driver, with the insurer compensating within reasonable limits. Vehicle damage insurance and TPL are basic vehicle insurances, primarily covering losses to the insured vehicle and third-party damages caused by its use. 4. Non-Deductible Insurance: Officially known as the No-Claim Discount Clause, it is an add-on to commercial insurance (vehicle damage or TPL). As an add-on, it requires the main insurance as a prerequisite and cannot be purchased separately. Its coverage typically involves special agreements.

How Does the Throttle Valve of a Diesel Engine Work?

The working principle of the throttle valve in a diesel engine is to control the engine's air intake, adjusting the mixture ratio of fuel and air based on computer signals, thereby ensuring complete fuel combustion to generate power. Throttle valves are generally divided into two main types: carburetor throttle valves and electronic throttle valves. Their working principles differ. The carburetor throttle valve regulates engine speed by drawing away fuel—the larger the throttle opening, the lower the engine speed. There is an air intake passage next to it. When the throttle angle is large, the air pressure inside the engine becomes lower than the outside air, causing some air to enter through the small passage, carrying away the corresponding amount of fuel. In other words, the smaller the throttle opening, the more fuel is drawn away. The electronic throttle valve uses varying voltages to regulate engine speed. The throttle valve controls the engine's air intake, adjusting the mixture ratio of fuel and air based on computer signals to ensure complete fuel combustion and power generation. When a driver presses the accelerator pedal, they are not directly controlling the fuel but rather the "air," as pressing the pedal and shifting gears forces a certain amount of air into the engine.

What is the penalty for overloading a 5-seater car with 3 extra passengers?

A 5-seater car carrying 8 people constitutes overloading by more than 50%, which will result in a deduction of 6 points and a fine. Additional information: According to the "Scoring Standards for Road Traffic Safety Violations," motor vehicle drivers committing any of the following violations will be penalized with 6 points: 1. Driving a motor vehicle while the driver's license is temporarily suspended; 2. Driving a motor vehicle in violation of traffic signals; 3. Driving a commercial passenger vehicle (excluding buses) or school bus with passengers exceeding the approved capacity by less than 20%, or driving other passenger vehicles with passengers exceeding the approved capacity by more than 20%; 4. Driving medium-sized or larger passenger or cargo vehicles, school buses, or hazardous material transport vehicles on highways or urban expressways at speeds exceeding the limit by less than 20%; 5. Driving medium-sized or larger passenger or cargo vehicles, school buses, or hazardous material transport vehicles on roads other than highways or urban expressways, or driving other motor vehicles at speeds exceeding the limit by more than 20% but less than 50%.

Is Southeast Motors a Domestic Car Brand?

Southeast Motors is a joint venture brand and also falls under the category of domestic cars. Here are the relevant details: Development History of Southeast Motors: Southeast Motors was established in 1995 through a joint investment by Fujian Automobile Industry Group Co., Ltd. and Taiwan China Motor Corporation. Subsequently, in 2006, Southeast Motors partnered with Japan's Mitsubishi Motors. As a result, the current equity of Southeast Motors is held by Fujian Automobile Group, Taiwan China Motor Corporation, and Mitsubishi Motors Group. Since Mitsubishi did not participate in the initial establishment of Southeast Motors, the brand is considered a domestic brand. Models of Southeast Motors: In its early stages, Southeast Motors was heavily influenced by the Taiwanese market, primarily producing vans and station wagons. The most famous model from this period was the Freeca, a recreational vehicle (RV) that combined the advantages of SUVs, MPVs, and station wagons. Starting in 2003, Southeast Motors began manufacturing sedans. The first sedan model introduced was the Lioncel, which was essentially the overseas version of the Mitsubishi Lancer.

Does Heavy Rain Cause Damage to Cars?

Whether parking a car outdoors during a heavy rain is harmful depends on the location; avoid low-lying areas to prevent flooding. Regularly check the vehicle's drainage channels for blockages. Detailed explanations are as follows: 1. Paint surface may corrode: Some areas have pollution, and the rain could be acid rain, exposing the car's paint directly to acid rain, which can cause corrosion, leading to rain marks, oxidation, or even cracking. 2. Dampness and mold: Compared to sunny days, the car interior is more prone to dampness and mold after rain. Additionally, rainwater can seep through the car's seams, causing metal parts to rust and corrode. Therefore, after the rain stops, accumulated moisture should be removed as soon as possible to prevent mold. 3. Bacterial growth: Bacteria thrive in damp environments, and the more humid the area, the faster bacteria multiply, especially during the rainy season. In normal times, areas without rain can be ventilated to maintain air circulation inside the car. However, during the rainy season, avoid opening windows for ventilation, as this can lead to rapid bacterial growth inside the car.

What to Do If the Vehicle Inspection Is Overdue by One Month?

If the vehicle inspection is overdue by one month, you need to promptly go to the vehicle management office for a re-inspection. However, please note: 1. Whether the inspection is overdue by one month or one day, it means the vehicle is no longer qualified to be driven on the road. 2. Once you discover that the vehicle inspection is overdue, you should immediately arrange for a supplementary inspection. Penalties related to overdue vehicle inspections: 1. Within three months: If the vehicle inspection is overdue for less than three months, you can simply apply for a re-inspection and will receive a verbal warning without a fine. 2. Over three months but less than two years: If the vehicle inspection is overdue for more than three months but less than two years, you will need to pay a fine ranging from 50 to 200 yuan and have 3 points deducted from your license. 3. Over two years: If the vehicle has not undergone an inspection for more than two years, the vehicle's registration will be canceled, and you will generally need to pay a fine to have it reinstated. 4. Driving without a timely inspection is considered illegal and may result in the vehicle being impounded. 5. If the vehicle fails to obtain an inspection compliance mark for three consecutive inspection cycles, it will be forcibly scrapped.

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