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What Color of Engine Oil Indicates It Needs to Be Changed?

1 Answers

PresleyAnn

07/29/25 5:35pm

Normal new engine oil is clean and free of impurities. You can pull out the dipstick and check the color on a piece of paper to see if it has turned black or contains excessive impurities to determine whether it needs to be changed. If the oil has changed from black to a milky white or other unusual color, it should be replaced immediately, as such oil has completely lost its lubrication and cleaning capabilities. Engine oil inherently has a cleaning function and can dissolve some carbon deposits generated inside the engine, so it will naturally darken after some use. This darkening alone does not necessarily mean it needs to be changed; oil changes should follow the recommended maintenance intervals and mileage. Engine oil, or motor lubricant, serves multiple functions including lubrication and friction reduction, auxiliary cooling, sealing and leak prevention, rust and corrosion protection, as well as shock absorption.

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How to Solve the Yellow Engine Light on the Dashboard?

Solution for the yellow engine light on the dashboard: After the engine fault light comes on, you need to go to a 4S shop or repair shop to use a diagnostic computer to read the fault code to help the technician determine the cause of the fault. Reasons for the yellow engine light on the dashboard: 1. Failure in the intake system: If the intake system is blocked or leaking, the engine fault light may come on; 2. Serious mechanical failure in the engine itself: If the engine timing is incorrect, it may cause engine failure; 3. Failure in the ignition system: The ignition system includes spark plugs and ignition coils. If the spark plugs or ignition coils fail, it may cause a certain cylinder of the engine to stop working, and the engine fault light will also come on; 4. Sensor failure: If the engine fault light comes on, it may be due to a failure in one of the oxygen sensor, air flow sensor, or knock sensor.

What level does LLumar Enjoy belong to?

LLumar Enjoy belongs to the mid-range level. Brief introduction of LLumar: AVS70 is a metallic film with a heat insulation rate of up to 58%, even higher than V-KOOL V70, delivering excellent performance. AIR80 has high light transmission with a sky-blue color and good heat insulation. Commonly used side window films: LATI35/15 features a diamond-like ceramic structure, ensuring stability and comes with a lifetime warranty. PP35 has a natural color with slight reflective effects, providing clear outward visibility and heat insulation. CTX30/40/50 from the Enjoy series utilizes advanced coated film technology with low visible light reflectivity, ensuring safe and enjoyable driving.

What does the AC button in the car mean?

The AC button in the car is the abbreviation of the air conditioning device. Pressing the AC button will start the air conditioning to adjust the temperature according to the set temperature, while turning it off will only activate the air blower part, adjusting the mechanism. When the AC button in the car is turned on, the compressor inside the car will start working. The AC button in the car also has a small function, which is to defog the windows. When the air humidity is relatively high, entering the car will make you feel very damp. At this time, pressing the button and blowing air for a while will remove a lot of the moisture, thereby achieving the function of defogging the windows. In AC mode, since the car's air conditioning compressor is always in working condition, it will inevitably lead to an increase in fuel consumption and engine load. When using the heater, the AC switch should be turned off to prevent the compressor from running while using the heater, causing additional fuel consumption during heating.

What is the Principle of a Pull-Back Car?

The principle of a pull-back car is that the axle transmits force to the pull-back gear to perform work, and the gear drives the pull-back gear. Design of the pull-back car: Through the axle transmitting force to the pull-back gear to perform work, the gear-driven pull-back gear structure converts the kinetic energy from hand motion into potential energy. The pull-back car is designed for rear-wheel forward drive, and the pull-back gear is designed for backward rotation to store energy. Due to the fixed direction of the axle, as long as the energy stored in the pull-back gear is sufficient or the static friction between the car and the ground is small enough, the pull-back car can move forward by the energy output from the pull-back gear, which acts as its heart. Difference between an inertia car and a pull-back car: An inertia car can move both forward and backward because it has a flywheel device, while a pull-back car can only move in a fixed, single direction.

What does the OBD light indicate?

OBD light indicates there is an issue with the vehicle's electronic control system or exhaust emissions. The specific condition needs to be checked by professionals at a repair shop or 4S dealership. OBD refers to On-Board Diagnostics system, which consists of a scanner, oscilloscope, and interface. It automatically diagnoses vehicle conditions and sends fault codes to maintenance personnel, enabling them to quickly locate the fault. If the vehicle's OBD interface is occupied, it is generally only used as a power source and will not affect the vehicle itself, as peripheral devices only read the data from the vehicle's computer via the OBD interface without writing programs. Moreover, OBD systems have self-protection functions; writing programs requires entering the correct password. Generally, for safety reasons, it is advisable not to arbitrarily occupy the vehicle's OBD interface.

What is the difference between automatic transmission and dual-clutch?

The differences between automatic transmission and dual-clutch: 1. Different principles: Automatic transmission uses a computer to control hydraulic oil to push pistons for gear shifting based on throttle size, vehicle speed, and throttle opening; dual-clutch sets two clutches, one controlling odd-numbered gears and the other controlling even-numbered gears. 2. Different operation methods: Automatic transmission vehicles automatically select the appropriate gear based on driving speed; dual-clutch combines two automatic transmission clutches together, eliminating the need to press the clutch pedal. 3. Different effects: Automatic transmission is more practical, allowing drivers to manually control gears to better match engine speed with gear position, which can also make the car more fuel-efficient; dual-clutch eliminates power transmission stagnation during gear shifting, ensuring that engine power is transmitted to the wheels without delay, commonly used in sports cars.

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