They're not interchangeable. "Run out" means your supply has been exhausted. You have no more. If you "run out of fuel", there's no fuel left. In this context, "run through" is usually followed by "a lot." If you "run through a lot of fuel", you use it up quickly. You may or may not have some left right now, but that's not what we're focusing on. We're focusing on the rate at which you use it.

No they are not Run out means - use up all of it Run through means - using very much

No, they are not interchangeable: * Run out of fuel: Means the fuel is completely used up. * Example: The car stopped because it ran out of fuel. * Run through fuel: Means using fuel quickly or in large amounts. * Example: This truck runs through fuel faster than I expected. "Run out of fuel" refers to fuel being gone, while "run through fuel" refers to how quickly or inefficiently fuel is being consumed.