How to Judge the Distance from the Rear Car When Reversing by Using the Rearview Mirror?

What are the sidewall markings on Pirelli tires?

Pirelli's run-flat tires are marked with R-F or EUFORI. This means that if you see R-F or EUFORI markings on the sidewall of a tire, it indicates that the tire is a Pirelli run-flat. Here is some related information: EUFORI: EUFORI is a unique MIRS tire produced by Pirelli, representing Pirelli's innovative run-flat technology. Each brand has different markings for run-flat tires. Goodyear's run-flat tires are marked with ROF; Bridgestone's run-flat tires are marked with RFT; Dunlop's run-flat tires are marked with ROF or DSST; Dema brand run-flat tires are marked with SSR; Michelin's run-flat tires are marked with ZP. Additionally, some brands may have a five-pointed star on the sidewall to indicate run-flat tires. Important Notes: It is important to note that the primary purpose of run-flat tires is not to drive long distances after a puncture, but to maintain vehicle stability and prevent accidents. Therefore, even when using run-flat tires, it is essential to replace the tire as soon as possible after a puncture and avoid prolonged driving.

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What is the Depreciation of a Car After Body Repair and Painting?

Generally, if a car has been in a major accident where the frame or main pillars were damaged and repaired, the depreciation can range from 10% to 30%. For minor body repairs and painting, there is usually little to no depreciation. Introduction to Auto Body Repair: Auto body repair refers to the process where there is visible deformation in the car. Based on the extent of the deformation, repair technicians use methods such as cutting, stretching, or grinding to correct the car's body. Then, they apply putty to reshape the body, restoring the damaged part as closely as possible to its original condition. A car is mainly composed of structural components and outer panels. Structural components primarily include the four beams and six pillars, and damage to these areas usually results from significant accidents or collisions. Generally, most modern cars use aluminum alloy bodies, which require specialized aluminum powder and curing powder for filling and repair. However, these materials are relatively costly. To save costs, many repair shops may use ordinary putty powder for filling. Although the visual appearance may be the same after painting, the performance may degrade over time, and the repaired area could deform again.

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What does SAE on engine oil mean?

SAE on engine oil stands for the abbreviation of the Society of Automotive Engineers, and the SAE grade represents the viscosity grade of the oil. Here are some relevant details about engine oil: 1. Types of engine oil: Engine oil refers to lubricants specifically used in internal combustion engines. In addition to lubrication, it also has functions such as cleaning, rust prevention, and cooling. 2. Composition of engine oil: The base oil of currently used engine oil is composed of hydrocarbons, poly-alpha-olefins (PAO), and poly-internal-olefins (PIO), all of which are organic compounds consisting solely of carbon and hydrogen. Some high-grade engine oils may contain up to 20% esters. 3. How to use engine oil: There are many types of engine oil available on the market. It is best not to mix two different brands of engine oil, as the additives used in different brands may vary, and mixing them could cause the oil to deteriorate. If mixing is necessary, a compatibility test should be conducted first. If the oils are compatible, they can be mixed, but the quality of the new oil will significantly decrease. 4. How to choose engine oil: It is generally difficult to distinguish the quality of engine oil based on appearance alone. Therefore, when purchasing engine oil, it is advisable to choose well-known brands of lubricants and buy from authorized dealers of reputable brands. The quality can be determined based on the API oil quality grade, and the packaging should clearly display the manufacturer's address, production date, and batch number.

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What Causes Backfiring in a Car's Exhaust Pipe?

Backfiring in a car's exhaust pipe can occur due to the following reasons: 1. Overly rich or lean air-fuel mixture: When the engine's combustible mixture is too rich, incomplete combustion occurs, and unburned mixture enters the exhaust pipe. Upon encountering fresh air in the exhaust system, it reignites, causing an explosion sound. Conversely, if the mixture is too lean, the spark energy may be insufficient to ignite it, leading to combustion in the exhaust pipe and resulting in backfiring. 2. Excessive fuel level in the float chamber: This creates an overly rich mixture and allows some fuel to enter the cylinder without proper atomization. The unburned fuel then travels to the muffler, where it reignites, causing backfiring. 3. Excessive ignition advance angle or excessive valve overlap: Incorrect gear installation can cause the exhaust valve to open prematurely, leading to backfiring. 4. Weak or interrupted spark: If the combustible mixture fails to ignite during a stroke, it may be ignited by high-temperature gases from the next stroke after entering the muffler. 5. Excessive fuel during startup: Multiple starting attempts can create an overly rich mixture, accumulating fuel in the cylinder and causing oil droplets to exit the muffler. When the engine starts, the fuel in the muffler ignites, resulting in backfiring. 6. Faulty ignition coil: A damp or leaking ignition coil can cause unstable or interrupted sparking, leading to backfiring, even if the CDI, high-voltage coil, and spark plug are functioning properly.

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How to Use a Column Shifter?

When shifting gears, press the brake pedal and then move the gear lever, just like with a regular automatic transmission car. After starting, the gear is in neutral (N). Pushing the lever upward engages reverse (R), while pushing it downward engages drive (D). When parking, press the brake, shift to neutral (N), then press the external button to engage park (P). Below is relevant information about column shifters: 1. One button on the column shifter is for park (P). Gently pushing the lever forward or backward engages neutral (N), pushing it firmly forward engages reverse (R), and pushing it firmly backward engages drive (D). The parking brake is replaced by the park (P) position. Remember to press the brake when shifting. 2. The term "column shifter" comes from the motion of pulling the gear lever toward the driver's chest when shifting. There are two types of gear lever arrangements in cars: floor-mounted and column-mounted. A gear lever located below the right side of the steering wheel is called a column shifter, which is more common in American cars. 3. Column shifters are generally automatic. Currently, common American cars with column shifters in the Chinese market include the Buick GL8 and older Regal models. German brands like Mercedes-Benz also frequently use column shifters, such as in the C, E, R, S, ML, and GL series. British brand Rolls-Royce's three current models (Phantom, Ghost, Wraith) also feature column shifters.

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Will there be any consequences if I accidentally used someone else's ETC when exiting the highway?

Those who exploit others' ETC will face penalties. Vehicles that illegally use another's ETC cannot evade surveillance. Once confirmed through license plate verification that a vehicle has engaged in ETC exploitation, it will be blacklisted. This will affect future highway access, potentially even leading to denied entry. Since there's no entry record at the toll station, the exit will be processed as a no-card situation, charging the maximum distance fee for the entire route. ETC Usage Precautions: The ETC transaction sensing range is 8 meters. When encountering a stationary vehicle ahead, maintain a distance of over 10 meters to prevent automatic fee deduction for the preceding vehicle, especially if its ETC device is faulty or absent. The ETC lane recognition speed limit is 20km/h. Exceeding this speed may prevent successful reading of vehicle device information, resulting in failed deductions. Unauthorized removal or movement of OBU devices, or detachment/loosening of ETC electronic tags will deactivate the tags. These can be inspected at the bank where the ETC card was issued or at highway service centers. Non-deliberate detachment only requires reactivation. When using debit cards linked to ETC, insufficient balance may cause deduction failures. Follow on-site staff guidance to use manual MTC lanes with cash or card payments. Excessively thick windshields may cause poor signal reception, particularly for vehicles with replaced windshields after accidents or modified front windshields.

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How to Judge the Distance from the Rear Car When Reversing by Using the Rearview Mirror?

What are the sidewall markings on Pirelli tires?

What is the Depreciation of a Car After Body Repair and Painting?

What does SAE on engine oil mean?

What Causes Backfiring in a Car's Exhaust Pipe?

How to Use a Column Shifter?

Will there be any consequences if I accidentally used someone else's ETC when exiting the highway?

Can a C1 license drive a 7-seater vehicle?

What Happens If You Don't Replace Spark Plugs?

How to Deal with Water Vapor Inside the Car?

What are the common engine sensors?