What are the differences between FAW and GAC?

What grade of gasoline should the Tianyi C5 use?

The Tianyi C5 should use 92-octane gasoline, as this is the recommended grade specified in the vehicle's official user manual. In addition to checking the appropriate gasoline grade in the user manual, you can also find this information on the fuel tank cap, where it is usually indicated. Typically, the gasoline grade can also be determined based on the engine's compression ratio. Vehicles with an engine compression ratio between 8.6-9.9 should use 92-octane gasoline, those between 10.0-11.5 should use 95-octane, and those with higher compression ratios should use 98-octane. However, with the application of new technologies, the compression ratio alone cannot determine the required gasoline grade. Engines with high compression ratios can also be tuned to use lower-octane gasoline, as factors like ignition timing, turbocharging technology, and Atkinson cycle technology also play a role. Generally, the higher the gasoline grade, the higher the octane rating and the better the anti-knock performance. 92-octane gasoline contains 92% isooctane and 8% n-heptane, while 95-octane gasoline contains 95% isooctane and 5% n-heptane. If the Tianyi C5 occasionally uses the wrong gasoline grade, simply switch back to the correct grade after refueling. However, prolonged use of the wrong grade can have the following effects: Using a higher-octane gasoline in a vehicle designed for a lower grade will not cause damage, but the increased octane rating can alter the fuel's ignition point, leading to delayed combustion. This reduces the engine's power output and thermal efficiency, resulting in poorer performance. Using a lower-octane gasoline in a vehicle designed for a higher grade can cause engine knocking. The significantly lower octane rating lowers the fuel's ignition point, causing premature ignition during the compression stroke. If combustion occurs before the spark plug fires, resistance is created during the upward stroke. This resistance makes the engine run very unevenly. Mild knocking may only increase noise without noticeable engine damage, but severe knocking indicates serious engine issues, affecting driving stability and causing abnormal wear on pistons and cylinders. In extreme cases, it can lead to cylinder scoring.

10

0

Share

What are the effects of using 92-octane gasoline on the Lamando?

According to the official vehicle manual recommendation, the Lamando should use 95-octane gasoline. In addition to checking the appropriate gasoline grade in the vehicle manual, you can also find it indicated on the fuel tank cap of the Lamando. Typically, the gasoline grade can also be determined based on the engine's compression ratio. Vehicles with an engine compression ratio between 8.6-9.9 should use 92-octane gasoline, while those with a compression ratio between 10.0-11.5 should use 95-octane gasoline. However, with the application of some new technologies, the gasoline grade cannot be solely determined by the compression ratio. A high compression ratio can also be adjusted to use lower-octane gasoline. This is because, apart from the compression ratio, other factors such as ignition timing, turbocharging technology, and Atkinson cycle technology also play a role. Generally, the higher the gasoline grade, the higher the octane number and the better the anti-knock performance. 92-octane gasoline contains 92% isooctane and 8% n-heptane, while 95-octane gasoline contains 95% isooctane and 5% n-heptane. If the Lamando occasionally uses the wrong gasoline grade, simply switch back to the correct grade after the current tank is used up. However, long-term use of the wrong gasoline grade can have the following effects: For vehicles recommended to use lower-octane gasoline, using higher-octane gasoline will not cause damage, but the increase in octane number will alter the fuel's ignition point, leading to delayed combustion in the engine. This means both the engine's power output and thermal efficiency will decrease, resulting in poorer performance as experienced by the driver. For vehicles recommended to use higher-octane gasoline, using lower-octane gasoline can cause engine knocking. Due to the significantly lower octane number, the gasoline's ignition point decreases, causing premature ignition during the compression stroke. If the fuel combusts before the spark plug ignites it during the compression stroke, resistance will occur during the upward stroke. This resistance makes the engine run very unstably. If the knocking is imperceptible, it only increases noise without obvious engine damage. However, if noticeable knocking occurs, it indicates severe engine conditions. The vibration not only affects driving stability but also causes abnormal wear on the pistons and cylinders, and in severe cases, can lead to cylinder scoring.

20

3

Share

What is the tire model of the Toyota Levin?

The Toyota Levin has two tire models: 205/55R16 and 225/45R17. In 205/55R16, the first number 205 represents the tire width of 205MM, 55 indicates the aspect ratio of the tire section is 55%, meaning the section height is 55% of the width, and 16 represents the rim diameter of 16 inches. The letter "R" in the middle stands for radial tire. In 225/45R17, the first number 225 represents the tire width of 225MM, 45 indicates the aspect ratio of the tire section is 45%, meaning the section height is 45% of the width, and 17 represents the rim diameter of 17 inches. The letter "R" in the middle stands for radial tire. The Toyota Levin is equipped with Dunlop and Yokohama brand tires, featuring aluminum alloy wheels, with a non-full-size spare tire. If you want to replace the tires yourself, you can follow these steps: Take out the spare tire and jack, place the jack under the vehicle frame of the tire to be replaced, ensuring the jack touches the metal part of the frame; Raise the jack until it supports the car, ensuring the jack is positioned under the vehicle and at a right angle to the ground; Remove the hubcap, loosen the nuts counterclockwise, but do not fully unscrew them—just enough to eliminate resistance. Keeping the tire on the ground when first loosening the nuts ensures that the nuts turn, not the tire; Turn the nuts counterclockwise until they are loose, repeat this step for all lug nuts, then completely remove the nuts; Place the new tire on the wheel hub, carefully aligning the tire rim with the wheel bolts, install the lug nuts, and hand-tighten them until all nuts are snug. The tire replacement is now complete. In addition to the model, tires also display the following common data: Tire cord material: Indicated by Chinese pinyin, such as M-cotton cord, R-rayon cord, N-nylon cord, G-steel cord, ZG-steel radial cord tire. Speed rating: Indicates the maximum speed at which the tire can carry a specified load under specified conditions. Letters A to Z represent certified speed ratings from 4.8km/h to 300km/h. Common speed ratings include: Q: 160km/h; H: 210km/h; V: 240km/h; W: 270km/h; Y: 300km/h; Rim specification: Indicates the rim specification compatible with the tire for practical use, such as "Standard Rim 5.00F".

7

2

Share

How to Tow a Car Without a Tow Hook?

The tow hook at the rear of the car is hidden, so you need to locate the tow hook position on the vehicle. Then, remove the decorative cover to reveal the tow hook inside. Once connected, you can proceed with towing.

13

0

Share

What are the techniques and methods for slope grading with excavators?

The best mindset is the unity of man and machine, where the mind, the person, and the machine are aligned in one line. Before grading the slope, always observe, clean, or level the ground to ensure the excavator remains stable during the process.

11

4

Share

How to reset the low tire pressure warning light?

Adjust the tires to the standard pressure, and after confirming normal tire pressure, visit an auto service shop to check the tire pressure sensors and clear the fault code. You need to locate the settings button on the center console for manual reset, usually by pressing the SET button.

19

4

Share

What are the differences between FAW and GAC?

What grade of gasoline should the Tianyi C5 use?

What are the effects of using 92-octane gasoline on the Lamando?

What is the tire model of the Toyota Levin?

How to Tow a Car Without a Tow Hook?

What are the techniques and methods for slope grading with excavators?

How to reset the low tire pressure warning light?

Is it necessary to clean carbon deposits inside the engine cylinders?

Where is the cabin air filter located in the Changan CS75PLUS?

What Causes a Loud Noise When a Car Goes Over a Bump Without Slowing Down?

Is It Normal to Smell Gasoline When Starting the Car?