Question

name: izander
automotive oil & lubrication

1. when you see a multi - viscosity range on a bottle of engine oil, what does this spec mean.

example: 10w - 40 10 w is when the engine cold

1. when oil loses its lubrication qualities, it will turn what color? black
2. how is oil moved throughout an engine?
3. when you remove or re - install an oil filter, always use an oil wrench. t or f
4. the best engine oil on the market is.
5. oil changes should take place every miles.
6. galleries are the very small holes inside an engine that move oil. t or f
7. a typical oil change will take 4 - 6 quarts of oil depending on engine size. t or f
8. the typical cost for an oil change at a dealership is approximately dollars.

Explanation:

Let's answer each question:

1. 10W - 40 meaning: The "W" stands for winter. 10W means the oil has a viscosity (thickness) rating of 10 at low (cold) temperatures, and 40 means it has a viscosity rating of 40 at high (operating) temperatures. So it's a multi - grade oil that works well in both cold start - up and normal operating conditions.

1. Oil color when lubrication is lost: When oil loses its lubrication qualities, it often turns black. This is because it has accumulated dirt, soot, and other contaminants from the engine.

1. How oil is moved in an engine: Oil is moved throughout an engine by the oil pump. The oil pump creates pressure that forces the oil through the oil passages (galleries) to lubricate the engine components.

1. Using an oil wrench for oil filter: When removing or reinstalling an oil filter, it is not always necessary to use an oil filter wrench. Sometimes you can remove it by hand (if it's not too tight), but an oil filter wrench can be helpful. So the answer is False (F).

1. Best engine oil: There is no single "best" engine oil as it depends on the vehicle's make, model, engine type, and driving conditions. However, synthetic oils like Mobil 1, Castrol Edge are often highly regarded, and also the oil recommended by the vehicle's manufacturer (e.g., for some cars, the manufacturer - specified synthetic blend or full - synthetic oil) is the best for that particular engine.

1. Oil change interval: Oil changes should typically take place every 3,000 to 7,500 miles, but this can vary greatly depending on the type of oil (conventional, synthetic, synthetic blend), the vehicle, and driving conditions (e.g., stop - and - go traffic, extreme temperatures). A common interval for conventional oil is 3,000 - 5,000 miles, and for synthetic oil, 7,500 - 10,000 miles.

1. Galleries in engine: Galleries are indeed the very small holes (passages) inside an engine that move oil to lubricate the engine parts. So the answer is True (T).

1. Oil change quart amount: A typical oil change does take 4 - 6 quarts of oil depending on the engine size. Smaller engines may take around 4 quarts, while larger engines (like V8s) may take 5 - 6 quarts. So the answer is True (T).

1. Cost of oil change at dealership: The typical cost for an oil change at a dealership is approximately $50 - $100, but this can vary based on the vehicle, location, and type of oil used (synthetic oil changes are more expensive than conventional).

Answer:

1. 10W means viscosity at cold, 40 at operating temp.
2. Black
3. By the oil pump
4. F
5. Depends on vehicle, e.g., synthetic (Mobil 1, etc.) or manufacturer - recommended
6. 3,000 - 7,500 (varies)
7. T
8. T
9. $50 - $100 (varies)