I always threw away the oil plug: a colleague told me what it was really needed for

3. **Maintains Freshness**: Keeping the plug in place when not in use can help keep the oil clean and free from contaminants.

If you’ve been discarding it, consider keeping it for future use! It can be a handy tool for safe and efficient oil management. If you have a specific type of oil plug in mind, feel free to share more details!