The differences between flash point and fire points are as follows-
| Flashpoint | Fire point |
|---|---|
| Flashpoint of given lubricants is defined as the lowest temperature at which the lubricant under test gives off sufficient vapours to produced a momentary spark when a standard flame is brought near it. | Fire point of lubricants is defined as the lowest temperature at which the vapours temperature at which the lubricants under test catch fire for at least 5 seconds when a standard flame is brought near it. |
| It has a lower value than the corresponding fire point of the same oil. | Fire point is 150C to 300C higher than the flash point of the same oil. |
| Comparatively less time is required to determine the flash point. | Comparatively more time is required to determine fire point. |
| Usually, the flash point of oil is determined. | Rarely, a fire point of oil is determined. |