How to Turn On High Beam and Low Beam Headlights?

Do I Need to Use Up All 92 Octane Gasoline Before Switching to 95 Octane?

It is recommended to completely use up the 92 octane gasoline before refueling with 95 octane, as this helps prolong the engine's service life. The reasons are as follows: 1. 92 octane and 95 octane gasoline have different stability levels. If mixed in large quantities, the gasoline's stability may be compromised. When driving with mixed gasoline, the engine may experience knocking or detonation, with noticeably increased vibrations, which can cause certain damage to the engine and lead to malfunctions. 2. When refueling, simply follow the instructions on the fuel tank cap. Of course, switching to a higher octane rating is not prohibited. However, based on practical experience, higher octane gasoline does not necessarily perform better nor provide additional engine protection. Many mid-to-high-end car engines have higher compression ratios, requiring more stable gasoline to reduce engine damage during combustion and extend engine life. Engines designed for 92 octane gasoline typically have relatively simpler structures and lower operational efficiency.

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What is the general slope of a car ramp?

The slope of a car ramp generally does not exceed 15%. Below is relevant information about car ramp slopes: 1. Straight ramp: The ramp width should not be less than 1200, with a slope not exceeding 1:12. 2. Double return ramp: The ramp width is 1200, with a slope of 1:12, and the depth of the starting point, ending point, and rest platform is 1500. 3. L-shaped ramp: The ramp width is 1200, with a slope less than 1:12, and the depth of the starting point, ending point, and rest platform is 1500. 4. Slopes greater than 10%: When the slope exceeds 10%, gentle slopes should be set at both the upper and lower ends of the ramp. The horizontal length of the straight gentle slope section should not be less than 3.6m, and the gentle slope gradient should be half of the ramp slope. The horizontal length of the curved gentle slope section should not be less than 2.4m, with a curve radius not less than 20m, and the midpoint of the gentle slope section should be the original starting or ending point of the ramp.

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What is the difference between the 2.0 and 2.5 displacement of the Atenza?

The differences between the 2.0 and 2.5 displacement of the Atenza: 1. The Atenza 2.0L is a naturally aspirated engine with a maximum of 158 horsepower. The Atenza 2.5L is also a naturally aspirated engine but with a maximum of 192 horsepower. 2. Both the 2.0 and 2.5 versions offer excellent handling, but the 2.5 provides stronger power when driving, and its transmission efficiency is several points higher than that of the 2.0. 3. Appearance differences: The entry-level version of the 2.5 Atenza comes equipped with 19-inch wheels. Larger wheels greatly enhance the car's appearance, as big wheels can cover many flaws. Moreover, the Atenza's design is already excellent, and the 19-inch wheels add the icing on the cake, making a significant visual difference. Therefore, choosing the 2.5 just for these larger wheels is worth it.

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Does 'e' Stand for Exhaust Valve or Intake Valve?

The full name of 'e' is exit, which means exhaust, while 'i' represents intake, being the abbreviation of 'in'. More details about valves are as follows: 1. The function of a valve is specifically responsible for introducing air into the engine and expelling the exhaust gases after combustion. In terms of engine structure, valves are divided into intake valves (intake-valve) and exhaust valves (exhaust-valve). The intake valve's role is to draw air into the engine to mix with fuel for combustion; the exhaust valve's role is to expel the burned exhaust gases and dissipate heat. 2. The valve head operates at very high temperatures (intake valve 570~670K, exhaust valve 1050~1200K) and also withstands gas pressure, the force of the valve spring, and the inertial force of the transmission components. With poor lubrication and cooling conditions, valves must possess certain strength, stiffness, heat resistance, and wear resistance. Intake valves are generally made of alloy steel (chromium steel, nickel-chromium steel), while exhaust valves are made of heat-resistant alloys (silicon-chromium steel). Sometimes, to save on heat-resistant alloy materials, the head of the exhaust valve is made of heat-resistant alloy, and the stem is made of chromium steel, after which the two parts are welded together.

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What does 17×7.5j mean in wheel specifications?

The wheel size 17×7.5j can be interpreted as follows: The number 17 refers to the wheel diameter in inches, indicating a 17-inch wheel. The number 7.5 represents the wheel's cross-section width in inches. The letter 'j' denotes the shape and height of the wheel flange. The 'X' in the middle does not signify length × width as commonly understood, but rather indicates that the wheel is of a one-piece deep well type, typically used for passenger vehicles. In contrast, large trucks and specialized wheeled machinery often employ semi-deep well wheels. The advantages of larger wheel sizes are as follows: 1. Larger wheels offer greater load-bearing capacity. Smaller wheels often use steel materials to save costs, whereas larger wheels typically employ aluminum alloy, especially those made by forging processes. The load-bearing capacity of such wheels is five times that of ordinary steel wheels. 2. Larger wheels improve the vehicle's cornering performance. After wheel modification, the increased contact area enhances stability during turns, significantly boosting the vehicle's cornering capability. 3. Larger wheels may reduce ride comfort. Generally, the overall tire diameter remains constant, meaning larger wheels result in thinner tire sidewalls. This reduces the tire's ability to dampen road noise, leading to increased cabin noise and compromised interior quietness.

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What maintenance should be done for a car with 70,000 kilometers?

For a car with 70,000 kilometers, the following maintenance should be performed: 1. Consider replacing the tires. When a car reaches over 70,000 kilometers, the tire tread is usually severely worn, and the rubber may have aged. For driving safety, it is recommended to replace the tires. 2. Replace the transmission fluid. Transmission fluid has a usage cycle and generally needs to be replaced every 2 years or 40,000 kilometers. 3. Clean the three-way catalytic converter. As the vehicle's mileage increases, carbon deposits from the engine can clog the three-way catalytic converter, leading to poor acceleration and failing emission standards. The cleaning cycle for the three-way catalytic converter is typically every 30,000 to 40,000 kilometers. It is recommended to clean it at this point. 4. Inspect the vehicle's suspension and various rubber bushings. These rubber bushings play a role in supporting and stabilizing the vehicle's engine. Over time, rubber aging can cause various noises from the chassis while driving. Therefore, it is recommended to inspect the suspension system.

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How to Turn On High Beam and Low Beam Headlights?

Do I Need to Use Up All 92 Octane Gasoline Before Switching to 95 Octane?

What is the general slope of a car ramp?

What is the difference between the 2.0 and 2.5 displacement of the Atenza?

Does 'e' Stand for Exhaust Valve or Intake Valve?

What does 17×7.5j mean in wheel specifications?

What maintenance should be done for a car with 70,000 kilometers?

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Is the spare tire of the Sylphy full-size?

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