Question 1

The "W" in SAE 5W-20 means ________.

Accepted Answer

The "W" in SAE 5W-20 stands for "Winter," indicating the oil's viscosity rating for cold temperatures.

Question 2

Oil change intervals as specified by the vehicle manufacturer ________.

Accepted Answer

D

Question 3

Most conventional (mineral) oil is made from what API group?

Accepted Answer

D

Question 4

Which rating is the ACEA rating specified for use by many European vehicle manufacturers?

Accepted Answer

The ACEA rating, such as A3/B3, is specified for use by many European vehicle manufacturers, indicating specific performance standards related to engine oil properties.

Question 5

Technician A says that the engine oil used should be meet the vehicle manufacturer's standards. Technician B says that the specified viscosity of oil should be used. Which technician is correct?

Accepted Answer

Both technicians are correct because using the engine oil that meets the vehicle manufacturer's standards ensures compatibility and performance, while using the specified viscosity is crucial for proper lubrication and engine function.

Question 6

Technician A says that some vehicle manufacturers recommend an ILSAC grade be used in the engine. Technician B says that an oil with the specified API rating and SAE viscosity rating should be used in an engine. Which technician is correct?

Accepted Answer

Both technicians are correct. Technician A is correct in stating that some vehicle manufacturers recommend an ILSAC (International Lubricant Standardization and Approval Committee) grade oil for their engines, which ensures the oil meets specific fuel economy and performance standards. Technician B is correct in stating that an oil should have the specified API (American Petroleum Institute) rating and SAE (Society of Automotive Engineers) viscosity rating for the engine, as these specifications ensure the oil meets the engine's operating requirements.

Question 7

Two technicians are discussing oil filters. Technician A says that the oil will remain perfectly clean if just the oil filter is changed regularly. Technician B says that oil filters can filter particles smaller than the human eye can see. Which technician is correct?

Accepted Answer

Technician B is correct because oil filters are designed to remove particles from the oil that are too small to be seen by the naked eye, ensuring the engine oil remains clean and effective for lubrication. Technician A is incorrect because simply changing the oil filter without changing the oil itself will not keep the oil "perfectly clean," as the oil can still degrade and become contaminated over time.

Question 8

The purpose of the oil filter bypass valve is to ________.

Accepted Answer

The oil filter bypass valve allows oil to bypass the filter if the filter becomes clogged, ensuring that the engine continues to receive oil flow even when the filter is unable to perform its function due to blockage. This is crucial for engine lubrication and protection.

Question 9

Different brands of oil can be used in a vehicle from one oil change to another if they meet vehicle specifications, because all oil is ________.

Accepted Answer

Different brands of oil can be mixed (are miscible) as long as they meet the vehicle's specifications, ensuring compatibility and preventing any potential issues with the vehicle's engine.

Question 10

Older engines that use flat-bottom lifters should use oil (or an additive) that has enough ________.

Accepted Answer

Older engines, especially those with flat-bottom lifters, require oil with sufficient ZDDP (zinc dialkyldithiophosphate) for its anti-wear properties. ZDDP acts as a buffer to prevent metal-to-metal contact within the engine, which is crucial for engines designed before the widespread use of roller lifters.

Question 11

Which of the following is NOT a characteristic of satisfactory engine oil?

Accepted Answer

Engine oil is designed to lubricate moving parts, reducing friction and wear, not to provide dry friction. Proper engine oil should resist foaming, pour at low temperatures, and have the proper viscosity to ensure smooth engine operation.

Question 12

Oil viscosity refers to which of these?

Accepted Answer

Viscosity is the measure of a fluid's resistance to flow, so oil viscosity refers to its tendency to resist flowing.

Question 13

Which of the following should be used when changing the oil in a car with a gasoline engine made in 2004 or later?

Accepted Answer

For gasoline engines made in 2004 or later, oils that meet the API SM classification are recommended. This classification ensures that the oil meets the performance standards set by the American Petroleum Institute for vehicles of that era, offering improved oxidation resistance, wear protection, and performance in a range of temperatures.

Question 14

Which statement below best defines the term miscible?

Accepted Answer

Miscibility refers to the ability of two substances to mix in all proportions, forming a homogeneous solution. In the context of oils, if they are miscible, they can mix with each other without causing problems, such as separation or the formation of layers.

Question 15

The engine oil life monitor may be based on ________.

Accepted Answer

The engine oil life monitor can be based on vehicle mileage, where it calculates the oil life based on how many miles the vehicle has traveled, or a PCM (Powertrain Control Module) programmed algorithm, which can take into account various factors such as driving conditions, engine temperatures, and more to more accurately predict oil life. Therefore, it can be based on either vehicle mileage or a PCM programmed algorithm.

Question 16

Many oils are identified by two numbers (i.e. 10W-30). These types of oil are referred to as ________ oils.

Accepted Answer

Multi-grade oils are identified by two numbers separated by a "W" (e.g., 10W-30), indicating their viscosity rating at different temperatures, making them suitable for use in varying climate conditions.

Question 17

Which of these oils contains no detergents or additives and is NOT suitable for use in engines?

Accepted Answer

SA grade oil contains no detergents or additives, making it unsuitable for use in modern engines which require these additives to help protect the engine and improve performance.

Question 18

Oil with a high viscosity has a ________ resistance to flow than oil with a lower viscosity.

Accepted Answer

Oil with a high viscosity has a higher resistance to flow compared to oil with a lower viscosity, as viscosity is a measure of a fluid's resistance to flow.

Question 19

Technician A always inspects or replaces the drain plug gasket when performing an oil change. Technician B says that warm oil holds contaminants and flows faster than cold oil. Who is correct?

Accepted Answer

Both technicians are correct. Technician A is following best practices by inspecting or replacing the drain plug gasket during an oil change to prevent leaks. Technician B is correct in stating that warm oil holds contaminants and flows faster than cold oil, which is why it's often recommended to change oil when it's warm to ensure more contaminants are removed with the oil.

Question 20

Most high mileage oils cannot meet IlSAC GF-4 rating and are, therefore, ________ for use in most engines.

Accepted Answer

Most high mileage oils do not meet the IlSAC GF-4 rating, which is a standard for engine oil performance. Therefore, they are not recommended for use in most engines that require this specification.

Quiz 22: Engine Oil