Common Mistakes When Changing Your Own Oil Filter (and How to Avoid Them)

Changing your own oil filter is one of the most common DIY maintenance jobs. It looks simple in theory, but a few common mistakes can turn it into a real engine problem.

Mistake #1: Not cleaning the mating surface

Before installing the new filter, make sure the old rubber gasket didn't stay stuck in place. Missing this detail causes a serious oil leak.

Mistake #2: Over- or under-tightening

Over-tightening damages the rubber gasket; under-tightening causes leaks. The rule of thumb: hand-tighten until it seats, then a quarter turn more — no tools.

Other common mistakes

• Not lightly oiling the rubber gasket with fresh oil before installing.
• Using a filter that doesn't match your engine's specification.
• Forgetting to check the oil level after startup.
• Disposing of the old filter and oil improperly.

Mada's advice

We stock genuine REXA filters and strainers, with our team available directly for any technical question before or after the job.