Is a Winter Tire Pressure of 2.0 Appropriate?

How to Check the Oil Gauge on a BMW 730?

To check the oil gauge on a BMW 730, follow these steps: Locate the vehicle information in the central display, where the oil level will be shown after the engine has been running for approximately three minutes. Engine oil serves multiple functions, including lubrication and wear reduction, auxiliary cooling, sealing and leak prevention, rust and corrosion protection, as well as shock absorption, making it the lifeblood of a car. The BMW 730 is the entry-level model of the BMW 7 Series, with dimensions of 5212mm in length, 1902mm in width, and 1478mm in height, and a wheelbase of 3210mm. It is powered by a 2.0T inline 4-cylinder turbocharged engine, paired with an 8-speed automatic transmission, delivering a maximum power of 195KW (265PS) and a maximum torque of 400Nm. The front suspension features a double-wishbone independent setup, while the rear suspension utilizes a multi-link independent configuration.

6

4

Share

Is it illegal to place a child safety seat in the front passenger seat?

Traffic laws do not specify the placement of child safety seats. However, it is not advisable to place a child safety seat in the front passenger seat because some child safety seats do not support rear-facing installation, and in the event of an accident, the child may be thrown forward, and the airbag deployed from the front passenger seat can still cause harm to the child. Therefore, it is best to place the child safety seat in the rear of the car, preferably in a rear-facing position, as this better protects the child's head and neck in the event of an accident. Below are some related details: 1. Reasons: Some child safety seats do not support rear-facing installation, and in the event of an accident, the child may be thrown forward, and the airbag deployed from the front passenger seat can still cause harm to the child. 2. Introduction to safety seats: A child safety seat is specifically designed for children of different weights (or age groups) and is installed in a car to effectively improve child passenger safety. In the event of a car collision or sudden deceleration, it can reduce the impact force on the child and limit the child's body movement, thereby minimizing injuries. Terms such as safety seat, child safety seat, and child car safety seat generally refer to this type of safety seat.

13

1

Share

Should the VV7 use 92 or 95 octane gasoline?

According to the official vehicle manual recommendation, the VV7 should use 92 octane gasoline. In addition to checking the suitable gasoline grade in the vehicle manual, the VV7's fuel cap also indicates the recommended octane rating. Generally, the appropriate 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 new technologies, the compression ratio alone cannot determine the required gasoline grade. High compression ratio engines can still be tuned to use lower octane gasoline because other factors, such as ignition timing, turbocharging technology, and Atkinson cycle technology, also play a role. Generally, the higher the gasoline octane rating, the higher the octane value 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 VV7 occasionally uses the wrong gasoline grade, simply switch back to the correct octane rating 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 a higher octane rating will not cause damage, but the increased octane value may alter the fuel's ignition point, leading to delayed combustion in the engine. This results in reduced engine power output and thermal efficiency, manifesting as poorer performance. For vehicles recommended to use higher octane gasoline, using a lower octane rating can cause engine knocking. Due to the significantly lower octane value, the gasoline's ignition point decreases, causing premature ignition during the compression stroke. If combustion occurs before the spark plug fires during the compression stroke, resistance will arise during the upward stroke. This resistance makes the engine run very unstably. Mild knocking may only increase noise without significant engine damage, but severe knocking indicates serious engine conditions. The vibrations not only affect driving stability but can also cause abnormal wear on the pistons and cylinders, potentially leading to cylinder scoring in severe cases.

11

2

Share

What is the passing score for Driving Test Subject 4?

According to the "Regulations on the Application and Use of Motor Vehicle Driver's Licenses", the passing score for both the road driving skills and safety & civilized driving knowledge tests in Subject 3 is 90 points. Each incorrect answer deducts 2 points, and candidates can only make up to 5 mistakes (10 points deducted) to pass. The full score is 100 points. Questions 1-10 are true/false questions; questions 11-40 are single-choice questions; and questions 41-50 are multiple-choice questions. The test includes image analysis, animated case studies, and text descriptions. The scope of Subject 4 covers: driving knowledge under adverse weather and complex road conditions; identification of common traffic signs, markings, and gestures; accident rescue and hazardous material handling knowledge; comprehensive judgment of violations and case analysis; emergency avoidance knowledge; safe driving knowledge; and driving ethics and civilized driving knowledge. According to the "Regulations on the Application and Use of Motor Vehicle Driver's Licenses", there is no limit to the number of attempts for Subjects 1 and 4. If a candidate fails the first attempt on the same day, they can retake it immediately. If they fail again, they need to reschedule, with no additional fees for retakes. However, the driving skills test permit is valid for three years. If the applicant fails to complete all tests within this period, previously passed subjects will be invalidated. Subject 4, also known as the theoretical test or driver's knowledge test, is part of the motor vehicle driver's license assessment. After the implementation of the Ministry of Public Security's Order No. 123, Subject 3 was divided into two parts: the road test and the safety & civilized driving knowledge test, commonly referred to as "Subject 4". It evaluates "driving ethics". Subject 4 is not officially a separate subject but is called so because it follows Subject 3. Officially, there is no "Subject 4". The safety & civilized driving knowledge test is conducted after Subject 3. Subject 4 Exam Notes: Exam Duration: 45 minutes. The test terminates if 12 points (6 questions) are deducted during the exam. Number of Questions: 50 questions are selected proportionally from the Subject 4 question bank based on the type of license, with each question worth 2 points. Question Types: Single-choice (including true/false) and multiple-choice questions, covering animated scenarios, image-based questions, situational recognition, and text descriptions. Retake Notes: Failing Subject 4 only requires retaking Subject 4. The driving school can schedule unlimited retakes without additional fees. The driving test consists of three subjects: Subject 1, Subject 2, and Subject 3, with Subject 3 divided into two parts. Subject 1 covers traffic laws, regulations, and related knowledge; Subject 2 evaluates field driving skills; and Subject 3 includes road driving skills and safety & civilized driving knowledge.

7

2

Share

How to Adjust the Valves on a 6-Cylinder Diesel Engine?

Open the cylinder head cover and rotate the crankshaft. Observe the movement of the valves in the 6th cylinder. When the intake and exhaust valves exhibit overlapping movement, it indicates the exhaust top dead center (TDC) of the 6th cylinder. Based on the engine's firing order, once the piston of a specific cylinder is determined to be at the compression top dead center position, you can proceed to adjust the intake and exhaust valve clearances for that cylinder.

9

4

Share

How to Add Windshield Washer Fluid to the Geely Xingrui?

Select the appropriate windshield washer fluid based on the climate conditions in your region. Choose an antifreeze-type washer fluid with a freezing point lower than the lowest expected temperature. Open the hood, locate the windshield washer fluid reservoir on the left side of the engine compartment, and carefully pour the diluted washer fluid into the reservoir.

19

4

Share

Is a Winter Tire Pressure of 2.0 Appropriate?

How to Check the Oil Gauge on a BMW 730?

Is it illegal to place a child safety seat in the front passenger seat?

Should the VV7 use 92 or 95 octane gasoline?

What is the passing score for Driving Test Subject 4?

How to Adjust the Valves on a 6-Cylinder Diesel Engine?

How to Add Windshield Washer Fluid to the Geely Xingrui?

What engine does the BMW 6 Series use?

What is the displacement of the BMW 6 Series GT?

What level of car does the BMW 6 Series GT belong to?

What engine is used in the BMW 6 Series Gran Coupe?