Engine oil is a vital component in the proper functioning of a combustion engine. It provides lubrication, reduces friction, cools the engine, and protects it from wear and tear. Here are the ins and outs of engine oil:

1. Lubrication: One of the primary functions of engine oil is to lubricate the moving parts within the engine. It forms a thin film between the metal surfaces, reducing friction and preventing direct metal-to-metal contact.
2. Viscosity: Viscosity refers to the oil’s resistance to flow. It is usually measured at two temperatures, such as 40°C and 100°C. The(SAE) assigns a viscosity grade to each oil, such as 5W-30 or 10W-40. The first number indicates the oil’s viscosity at low temperatures (W stands for winter), while the second number represents the viscosity at high temperatures.
3. Types of Engine Oil: There are different types of engine oils available, including conventional, synthetic, and semi-synthetic. Conventional oil is derived from crude oil and is the most common type. Synthetic oil is artificially made and offers improved performance and protection. Semi-synthetic oil is a blend of conventional and synthetic oils, providing a balance between performance and cost.
4. Oil Change Intervals: Regularly changing the engine oil is essential for maintaining engine health. The interval between oil changes depends on various factors such as the type of oil, driving conditions, and the manufacturer’s recommendations. It is typically recommended to change the oil every 5,000 to 7,500 miles (8,000 to 12,000 kilometers) or every six months, whichever comes first.
5. Oil Filter: The oil filter is an integral part of the lubrication system. It removes contaminants and particles from the oil, ensuring that only clean oil circulates through the engine. During an oil change, it is essential to replace the oil filter as well.
6. Oil Additives: Some engine oils come with additives that enhance their performance and protect the engine. Additives may include detergents to clean deposits, dispersants to suspend particles, antioxidants to prevent oxidation, anti-wear agents to reduce friction, and viscosity modifiers to maintain consistent oil thickness.
7. Checking Oil Level: Regularly checking the oil level is crucial to ensure that the engine has enough oil for proper lubrication. Most vehicles have a dipstick that allows you to check the oil level easily. It’s important to follow the manufacturer’s instructions on checking the oil level and adding oil when necessary.
8. Environmental Impact: Used engine oil is considered hazardous waste and should be disposed of properly. Many automotive shops and recycling centers accept used oil for recycling. Improper disposal of oil can harm the environment, so it’s essential to handle and dispose of it responsibly.

Remember, it’s always best to consult your vehicle’s owner’s manual and follow the manufacturer’s recommendations for engine oil type, viscosity, and change intervals to ensure optimal engine performance and longevity.

Engine oil does not typically come off and on by itself. However, there are a few situations where oil levels may fluctuate or appear to be low. Here are some possible reasons:

1. Oil Consumption: Over time, engines can consume small amounts of oil due to normal wear and tear. The oil gradually burns off or leaks out, leading to a decrease in the oil level. It’s important to monitor oil levels regularly and top up as needed.
2. Leaks: Oil leaks can occur due to faulty gaskets, seals, or other engine components. If there is a leak, oil can escape from the engine, resulting in lower oil levels. Leaks should be identified and repaired promptly to prevent engine damage.
3. Oil Dilution: In certain situations, such as frequent short trips or excessive idling, unburned fuel can get into the oil. This can dilute the oil and cause it to appear lower on the dipstick. This issue is more common in  (GDI) engines. Regularly changing the oil and using the appropriate oil viscosity can help mitigate this problem.
4. Oil Foaming: In some cases, excessive engine vibrations or improper oil circulation can cause the oil to foam. When the oil foams, it can create air pockets, leading to inaccurate oil level readings. Proper maintenance and using the recommended oil can help prevent foaming.
5. Temperature Changes: Engine oil expands when heated and contracts when cooled. As a result, the oil level may appear lower when the engine is hot and higher when it’s cold. It’s important to check the oil level when the engine is at operating temperature for accurate readings.

If you notice significant fluctuations in your engine oil level or suspect any issues, it’s advisable to have your vehicle inspected by a qualified mechanic. They can diagnose the problem and provide the necessary repairs or maintenance to ensure proper oil levels and engine function.

If your oil light is coming on and off despite the oil level being full, it could indicate a problem with the oil pressure or the oil pressure sensor. Here are a few possible reasons for this issue:

1. Faulty Oil Pressure Sensor: The oil pressure sensor is responsible for monitoring the oil pressure in the engine. If the sensor is faulty or malfunctioning, it may send incorrect signals to the dashboard, causing the oil light to come on and off even when the oil level is adequate. Replacing the sensor should resolve the issue.
2. Clogged Oil Passages: Over time, sludge, debris, or contaminants can accumulate in the engine’s oil passages, such as the oil pump or oil filter. These blockages can restrict the flow of oil, leading to low oil pressure and triggering the oil light. Flushing the engine or cleaning the oil passages can help alleviate the problem.
3. Worn Oil Pump: The oil pump is responsible for circulating the oil throughout the engine. If the pump becomes worn or damaged, it may not be able to maintain sufficient oil pressure, causing the oil light to flicker or stay on. In such cases, the oil pump may need to be replaced.
4. Engine Wear or Damage: If the engine has excessive wear, such as worn bearings or piston rings, it can lead to lower oil pressure. Similarly, if there is damage to the engine components, such as a cracked oil pan, it can cause oil leaks and a drop in oil pressure. These conditions can trigger the oil light to illuminate even with a full oil level. Proper diagnosis and repair of the underlying engine issue are necessary in such cases.
5. Electrical or Wiring Issues: Sometimes, electrical problems or wiring issues can cause intermittent signals to the oil pressure sensor, resulting in inconsistent readings and the oil light coming on and off. A thorough inspection of the electrical system and sensor connections may be required to identify and rectify any wiring problems.

It’s important not to ignore an oil light that comes on and off, as it could indicate a potential problem with the oil pressure system. It is recommended to have your vehicle inspected by a qualified mechanic to diagnose the issue accurately and address any necessary repairs to ensure the engine’s health and performance.

Determining if your oil pump is bad can be challenging, as it requires a proper diagnosis by a qualified mechanic. However, there are some signs and symptoms that may indicate a faulty oil pump. Here are a few indicators to look out for:

1. Low Oil Pressure: A bad oil pump may result in insufficient oil pressure, which can be indicated by a low oil pressure reading on the gauge or a warning light on the dashboard. If you consistently observe low oil pressure despite having the correct oil level, it could be a sign of a malfunctioning oil pump.
2. Engine Noise: Insufficient oil pressure caused by a faulty oil pump can lead to increased friction and poor lubrication of the engine components. This can result in unusual engine noises, such as ticking, knocking, or rattling sounds. If you notice these noises, it’s crucial to have your vehicle inspected promptly.
3. Increased Engine Temperature: Inadequate lubrication due to a malfunctioning oil pump can lead to increased friction and heat buildup in the engine. As a result, you may notice higher engine temperatures or your vehicle’s temperature gauge reaching the red zone. Overheating can cause severe engine damage, so it’s important to address it immediately.
4. Warning Lights: In some cases, a malfunctioning oil pump may trigger the oil pressure warning light on the dashboard. If this light illuminates, it’s crucial to have the oil pressure system checked as soon as possible.
5. Engine Performance Issues: Insufficient oil pressure can negatively impact engine performance. You may experience a loss of power, poor acceleration, or a decrease in fuel efficiency. If you notice any significant changes in your vehicle’s performance, it’s advisable to have it inspected by a professional.

If you suspect a problem with your oil pump or encounter any of the aforementioned signs, it’s recommended to consult a qualified mechanic. They can perform a thorough inspection, conduct diagnostic tests, and determine whether the oil pump is indeed faulty. Keep in mind that addressing oil pump issues promptly can help prevent further damage to your engine and ensure its proper functioning.