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Can a New Car Drive on the Highway?

1 Answers
StValerie
07/29/25 11:35am
New cars can drive on the highway. Driving on the highway does not mean running at high RPM. As long as the RPM does not exceed 3000, it is not a big issue. Precautions for new cars on the highway: 1. A highway refers to a road specifically designed for high-speed driving. For new cars on the highway, it is important to vary the speed and gear periodically. This allows the gears of each gear position to break in properly and reduces excessive wear on any single gear. The concept of the break-in period comes from the era of older cars when engine and other automotive manufacturing processes were relatively crude, and the produced mechanical parts were not very smooth, especially the engine. 2. During the break-in process, many metal fragments will wear off and mix into the engine oil.
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More Forum Discussions

What does cylinder head contact mean?

Engine cylinder head contact occurs when the connecting rod is too long due to excessive clearance, causing it to hit the engine cylinder during operation, which is referred to as cylinder head contact. If an engine experiences cylinder head contact, it usually means the engine is scrapped. Additional details are as follows: Causes of cylinder head contact: When there is an issue with the connection between the piston and connecting rod, such as excessive clearance, the piston may exceed its normal operating trajectory, directly hitting the cylinder head. A dropped timing chain or belt, or a broken crankshaft pin, can also cause cylinder head contact, known as timing jump. This happens when the timing belt has been in use for too long or exceeds its service life, the tension adjustment device fails, or the timing belt and timing gear do not fit tightly, creating a gap. Valve issues can also lead to cylinder head contact, such as a stuck valve stem, broken intake or exhaust spring, or a valve falling into the cylinder. During repairs, using incorrect piston sizes, overly thick connecting rod bearings or shims, or a damaged cylinder block surface can also cause the piston top to be too high.
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Can Sinopec Gas Be Added to a Half Tank of PetroChina Gas?

Sinopec 95 can be mixed with PetroChina 95. Whether gasoline can be mixed depends on the gasoline grade, not the manufacturer, meaning gasoline of the same grade can be mixed. Although Sinopec 95 can be mixed with PetroChina 95, it is not recommended to mix them frequently. Although both Sinopec 95 and PetroChina 95 are produced according to the same specifications and meet national standards, it is best to stick to one brand. After all, the crude oil processing procedures and additives used by the two are always different. Long-term mixing may easily lead to engine shaking and carbon deposits in the combustion chamber. Below is more related information: Differences between Sinopec and PetroChina: 1. Raw materials: PetroChina mainly uses crude oil from oil fields in northern China, while Sinopec relies on imported crude oil as there are few oil fields in southern China. 2. Additives: Sinopec uses imported crude oil additives, and its oil quality is slightly better than PetroChina's. 3. Production technology: Sinopec uses world-leading crude oil refining technology, and its refined oil has a higher density than PetroChina's.
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What is the difference between ceramic brakes and regular brakes?

Here are the differences between ceramic brakes and regular brakes: 1. Composition: Ceramic brakes eliminate noise issues as they contain no metal components, avoiding the sound of friction against the brake disc. 2. Impact on brake disc lifespan: Compared to regular brakes, ceramic brakes can extend the lifespan of brake discs and prevent scratches on them. 3. Temperature resistance: Ceramic brake pads are more heat-resistant than regular brake pads. 4. Friction coefficient: Ceramic brake pads maintain a stable friction coefficient, ensuring excellent braking performance. 5. Heat dissipation: Ceramic brake pads dissipate heat faster than regular brake pads.
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What Happens When a Car is Struck by Lightning?

When a car is struck by lightning, the people inside are not at risk of electric shock, but the penetrating effect of the lightning can cause some electronic devices to short-circuit and spontaneously combust, thereby damaging the vehicle. Additional details are as follows: When lightning strikes the car, the vehicle body acts as a large metal cage conductor, and the car's exterior shell functions as an equipotential body. People inside the metal cage are safe because the current passing through the metal cage is ultimately conducted to the ground through the tires. It is important to note that although the thousands of volts of current passing through the car do not pose an electric shock risk to the occupants, the penetrating effect of the lightning can cause some electronic devices to short-circuit and spontaneously combust, leading to vehicle damage. Once the electronic devices in the car malfunction, it will inevitably affect safe driving. Additionally, at the moment the vehicle is struck, the exterior shell's temperature can rise above 1,000 degrees Celsius. Therefore, occupants must remember not to exit the car to inspect the damage, both to prevent burns and to avoid being struck by lightning again.
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How to Determine if a Manual Transmission is in Neutral?

Manual transmission determining if it's in neutral method is as follows: Step on the accelerator: If the gear is in neutral, when you step on the accelerator, you can hear the engine speed increase and make noise. If the gear is in any other position, the vehicle will move forward or backward when you step on the accelerator. Remember to gently press the accelerator or engage the handbrake for testing. Otherwise, if the gear is not in neutral, the vehicle may start moving, which could be dangerous. If the handbrake is engaged and the gear is not in neutral, the vehicle will show obvious signs of moving forward or backward. 2. Wiggle the gear lever: Determine if the gear is in neutral by wiggling the gear lever left and right with your hand. Because the gap between left and right in neutral is relatively large, you'll feel a noticeable wiggle. If the gear is engaged (not in neutral), the left-right gap will be very small, with almost no room for left-right movement. 3. Gear engagement test: If you can't determine whether the car is in neutral, use the gear engagement test. If the gear is in 1st, 3rd, or 5th gear, when trying to engage another gear, since the lever is already in gear, it will obviously be unable to engage further. Gently pulling the lever down at this point will put it in neutral.
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Why is the engine noise loud inside the car?

Here are the reasons for loud engine noise inside the car: 1. Weather conditions: Cold weather causes the engine idle speed to increase, and the cold engine maintains high RPM. 2. Loose plastic parts in the engine compartment: Such as the engine cover, intake pipe, etc., which can be fixed by tightening. 3. Incorrect engine oil condition: When the viscosity of the engine oil is too high, it can easily cause problems in engine operation, reduce lubrication, leading to friction during engine operation and resulting in noise. 4. Valve leakage: During the reaming of the valve seat, improper operation or excessive wear of the valve guide inner hole can cause the valve seat to tilt or the valve clearance to be too small, leading to valve burning and resulting in poor valve sealing and leakage.
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