A magnetic oil filter drain plug and/or an oil filter magnet add one more potential layer of engine protection. Do they work? Residue on the drain plug says yes, but it’s anyone’s guess with the oil ...

Marumi's amazing Magnetic Graduated Neutral Density use science, rather than slots ...

We compare magnetic vs locking filters to see which stays securely in place. Watch real tests showing why locking filters outperform magnets and stay put during use.