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Can Different Brands of Engine Oil Be Mixed?

1 Answers
StCollin
07/28/25 5:55pm
It is not recommended to mix different brands of engine oil. Here is some relevant information about engine oil: Function: Engine oil, also known as engine lubricant, serves to lubricate and reduce friction, assist in cooling, seal against leaks, prevent rust and corrosion, and provide shock absorption for the engine. Classification: Gasoline engine oil is divided into mineral oil and synthetic oil, with synthetic oil further categorized into semi-synthetic and full-synthetic oils. Composition: Engine oil consists of base oil and additives. The base oil is the main component of the lubricant, determining its basic properties, while additives compensate for and improve the shortcomings of the base oil, providing certain new properties, making them an essential part of the lubricant.
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What are the impacts of forgetting to turn off the engine with one-push start?

Forgetting to turn off the engine with one-push start prevents the car from being locked. For vehicles with one-push start, the engine must be turned off in the P (Park) position to completely cut off the power. Otherwise, although the engine stops running, the vehicle's power cannot be fully turned off, and the doors cannot be locked. If the engine is not turned off in the P position, you need to press the start button again before exiting the vehicle to completely cut off the power, allowing the doors and steering wheel to be locked. The steps to turn off the engine in a one-push start vehicle are as follows: Press the brake pedal and bring the vehicle to a smooth stop; shift the gear from D (Drive) to N (Neutral), engage the handbrake, and then release the foot brake (do not turn off the power yet); press the foot brake again, shift the gear from N to P, and release the foot brake; press the one-push start button to turn off the power and complete the engine shutdown.
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What Causes the One-Button Start to Be Unresponsive?

Unresponsive sensing, key fob battery depletion, or vehicle malfunctions can cause the one-button start to be unresponsive. Unresponsive Sensing: Frequently placing the key fob near electronic devices such as mobile phones, computers, or televisions can interfere with the low-intensity radio waves in the key. Additionally, strong radio waves from sources like TV towers, airports, or power plants in the vicinity can cause the one-button start to "fail." Key Fob Battery Depletion: If the key fob shows signs like reduced remote control range or unresponsive sensing, it indicates the battery is nearly depleted. In this state, the one-button start function cannot operate properly. Vehicle Malfunctions: Issues such as fuel system problems, dead battery, or short circuits in electronic components can also be culprits. Solutions for an Unresponsive One-Button Start: For unresponsive sensing, simply move away from the interference area. If the key fob battery is depleted, replace the battery as soon as possible. For vehicle malfunctions, visit a repair shop to diagnose the specific issue and perform necessary replacements.
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Do You Need to Press the Brake for One-Button Start?

One-button start requires pressing the brake; the vehicle cannot start without pressing the brake. Pressing the brake prevents the car from suddenly moving forward, which is a safety design. Automatic transmission cars with one-button start functionality require pressing the brake pedal before starting, and it is also necessary to ensure the gear is in the P position. Correct operation for one-button start: For models equipped with one-button start, do not press the brake initially when starting. First, press the one-button start key once to power on the vehicle. Wait for the vehicle's self-check to complete, then press the brake pedal. At this point, pressing the one-button start again will start the vehicle. Precautions for one-button start: Pressing the one-button start without pressing the brake powers on the vehicle; pressing the one-button start while pressing the brake starts the engine.
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What is the reason why the one-button start suddenly cannot turn off the engine?

One-button start suddenly cannot turn off the engine due to reasons such as the idle switch not closing, idle control valve failure, intake pipe leakage, etc. The details are as follows. Idle switch not closing: If the engine speed does not increase when the air conditioner is turned on at idle, it can be proven to be this fault. The throttle position sensor can be adjusted, repaired, or replaced. Idle control valve failure: Check the operating sound of the idle control valve. If there is no operating sound, it means the idle control valve has failed. The idle control valve can be cleaned or replaced, and the idle speed can be set using a special decoder. Intake pipe leakage: If a hissing sound of leakage is heard in the intake pipe, it proves that the intake system is leaking. The leakage point can be found, and the system can be resealed or related components can be replaced.
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How Many Times Should You Press the One-Button Start to Turn Off the Engine?

When in P gear, press once to directly turn off the engine and cut power; when in N gear, press once to turn off the engine but not cut power—you need to shift to P gear and press twice to cut power. Important Note: If an emergency occurs while the vehicle is in motion, you can turn off the engine by pressing the one-button start for more than 3 seconds or pressing it three times consecutively. In this case, the power switches to ACC mode. The correct steps to turn off the engine using the one-button start are as follows: Press the brake, bring the vehicle to a complete stop, and shift from D gear to N gear. Engage the handbrake (if it's an electronic handbrake, simply pull it up). Release the foot brake but do not turn off the power—this is to confirm that the vehicle comes to a complete stop under the handbrake's effect and to prevent the P gear from locking. Continue pressing the foot brake, shift from N gear to P gear, release the foot brake, press the one-button start, and the power will turn off, completing the engine shutdown.
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How many seconds count as stopping in Subject 2?

In Subject 2, a pause of 2 seconds is considered an intermediate stop. During the Subject 2 test, most items require continuous operation without stopping, otherwise the test will be judged as a failure. Principle: The test vehicle's wheels are equipped with sensors; an intermediate stop, meaning the speed is 0, will be detected if the pause exceeds 2 seconds during the test, and the sensor will feedback to the computer, resulting in a failed test. Solution: Generally, the instructor will take the examinee to familiarize themselves with the test site in advance. The size of the test site is similar to the practice field, so getting familiar with the road conditions and finding the right points in advance is sufficient. Additionally, during the Subject 2 test, although the speed should be slow, it should not be too slow; maintaining the usual practice speed is recommended.
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