You should change your oil plug gasket at every oil change.
More specifically, if your vehicle uses a crush washer (typically made of copper or aluminum) on the oil drain plug, it must be replaced each time you change your oil. These gaskets are designed to deform and create a tight seal when the drain plug is tightened. Reusing them can lead to leaks.
Here's a breakdown of why:
- Designed for Single Use: Crush washers are designed to be compressed and form a tight seal during the initial tightening. Once they are compressed, they don't spring back to their original shape.
- Prevents Leaks: A new crush washer ensures a leak-free seal between the oil pan and the drain plug. Reusing a flattened washer can compromise the seal and result in oil leaks.
- Cost-Effective Insurance: Oil plug gaskets are inexpensive. Replacing them is a cheap way to avoid potential problems and protect your engine.
- Material Matters: While copper and aluminum crush washers are most common, some vehicles use rubber O-rings or other types of gaskets. The principle remains the same: if the gasket is designed to be compressed or deformed for a single-use seal, replace it at each oil change.
Consequences of Reusing:
- Oil Leaks: This is the most common problem. A slow oil leak can lead to low oil levels, potentially causing engine damage.
- Environmental Impact: Leaking oil is harmful to the environment.
- Safety Hazard: Oil leaks can create a fire hazard.
Therefore, always replace your oil plug gasket/washer every time you perform an oil change to ensure a proper seal and prevent potential problems.
