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What type of fuel should a BMW 5 Series use?

BMW 5 Series requires fuel with an octane rating of 95 or higher. The fuel grade is classified based on the octane number, which indicates the fuel's anti-knock properties. Iso-octane has excellent anti-knock performance and is assigned an octane value of 100, while n-heptane has poor anti-knock properties and is prone to engine knocking in gasoline engines, thus assigned an octane value of 0. Higher fuel grades offer better anti-knock performance, and the appropriate fuel grade should be selected according to the engine's compression ratio. The BMW 5 Series is a mid-to-large luxury sedan under the BMW brand, with dimensions of 4998mm in length, 1901mm in width, and 1559mm in height, and a wheelbase of 3108mm. The seats and door interiors of this vehicle are adorned with premium Dakota leather, exuding an elegant and sophisticated ambiance. Additionally, it features an 8-inch screen mounted on the back of the front seats and a refrigerator compartment in the center of the rear seats.

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Where is the fender located on a car?

The fender is located in the semi-circular area directly above the car tire. It not only helps reduce the drag coefficient during driving based on aerodynamics, greatly aiding the car's stability, but also prevents gravel and mud kicked up by the wheels from splashing onto the underside of the vehicle body, thereby protecting the car's chassis. The front fender is installed near the front wheels. Since the front wheels have a steering function, it is essential to ensure the maximum clearance for the front wheels when turning. Therefore, designers use wheel travel diagrams based on the selected tire model and size to verify the fender's design dimensions. The rear fender does not face issues related to wheel rotation and contact, but for aerodynamic considerations, it features a slightly arched curve that protrudes outward.

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Can a car pass the annual inspection after removing the rear emblem?

Removing the rear emblem of a car does not affect passing the inspection; the annual inspection does not include checking the characters on the rear of the vehicle. However, the vehicle's exterior must not be modified, specifically including the following: 1. Adding body kits. 2. Changing the body color. 3. The color of window tint or sun film should not be too dark (items inside the vehicle must be visible from one meter away; mainly applies to vans and trucks, not relevant for passenger cars with fewer than 5 seats). 4. Vans and trucks must have enlarged rear license plate numbers. 5. The number of leaf springs must not be increased or decreased. 6. The number of seats in a van must not be altered, and a fire extinguisher must be present. 7. The cargo compartment of a box truck must not be modified (no side doors, no roof openings, no tailgates). 8. The size of the tires must not be changed, and the tread patterns of tires on the same axle must be consistent. 9. Vehicles with unresolved traffic violations or those impounded by the court cannot undergo the annual inspection.

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Should Fog Lights Be Turned On During a Sandstorm?

Fog lights should be turned on during a sandstorm. Here is some relevant information about fog lights: 1. Introduction: Installed at the front of the car, slightly lower than the headlights, fog lights are used to illuminate the road during rainy or foggy weather. Because visibility is low in foggy conditions, the driver's line of sight is limited. Fog lights can increase the visibility distance, especially the strong penetration of yellow fog lights, which can improve the visibility for both the driver and other traffic participants, allowing oncoming vehicles and pedestrians to spot each other from a greater distance. 2. Classification: Fog lights are divided into front fog lights and rear fog lights. Front fog lights are usually bright yellow, while rear fog lights are red. The symbol for the rear fog light is slightly different from that of the front fog light—the light lines of the front fog light symbol point downward, while those of the rear fog light are parallel, generally located on the dashboard inside the car. Due to their high brightness and strong penetration, fog lights do not produce diffuse reflection because of fog, so correct usage can effectively prevent accidents. In foggy weather, front and rear fog lights are usually used together.

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What are the major impacts of adding tap water to a car radiator?

When the water level in the car radiator is insufficient during driving, tap water can be temporarily used to replenish it, and the impact is not significant. However, it is not recommended to use tap water for a long time because it contains many impurities, which can cause scale and rust in the radiator. More details are as follows: 1. The difference between antifreeze and tap water: The radiator is filled with antifreeze specifically designed for cars. The boiling point of this antifreeze differs from that of ordinary water. Ordinary water boils at 100 degrees Celsius, while antifreeze can reach a boiling point of over 110 degrees. Tap water can be used temporarily for a short period, but if the car's water temperature warning light does not come on, it is advised not to add tap water, as it contains many impurities and is prone to leaving deposits. 2. The role of antifreeze: The water in the car radiator is antifreeze, which has functions of antifreeze, anti-rust, and anti-boil. However, not all cars have the same boiling point for their coolant, as vehicles choose coolant based on the local minimum temperature. Some car owners may opt to use water instead in the summer, utilizing water as a heat transfer medium to dissipate heat through convection and maintain the engine at an appropriate operating temperature.

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What are the causes of long-term fuel trim being too high?

The reasons for long-term fuel trim being too high are: 1. Clogged fuel injectors and poor spark plug combustion; 2. Poor quality gasoline; 3. Measurement deviation of the air flow meter and air leakage; 4. Long-term failure to replace the fuel filter, resulting in low fuel pressure; 5. Oxygen sensor detecting excessively high oxygen content. The suitable range for long-term fuel trim is between -23% and 16%. The following factors affect the fuel trim coefficient: 1. Engine misfire: When the engine misfires, incomplete combustion occurs in the cylinder, leading to high levels of HC and O2 in the exhaust. Since HC does not easily participate in catalytic reactions, oxygen consumption is low, and residual oxygen levels are high, causing the oxygen sensor to measure a lower voltage, indicating a lean mixture. The ECU then increases fuel injection, making the short-term fuel trim correction value positive. 2. Poor exhaust flow: A clogged exhaust pipe obstructs the discharge of exhaust gases, manifesting as excessive backpressure and reduced intake of fresh air into the cylinders. This results in incomplete combustion of the mixture, with the oxygen sensor voltage exceeding 0.45V, and the fuel trim coefficient becoming negative. 3. Low fuel pump pressure or clogged fuel injectors: Clogged fuel injectors cause symptoms such as sluggish acceleration and lack of power at high speeds. The engine remains in a lean mixture state.

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Is Junma a Domestic or Joint-Venture Car Brand?

What type of fuel should a BMW 5 Series use?

Where is the fender located on a car?

Can a car pass the annual inspection after removing the rear emblem?

Should Fog Lights Be Turned On During a Sandstorm?

What are the major impacts of adding tap water to a car radiator?

What are the causes of long-term fuel trim being too high?

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