This Mann Filter Oil Filter has PTFE-coated bypass valves that offer great resistance to weather, corrosion and rust. It has a great dirt holding capacity and a long-life filter media.

Bypass valves allow oil to continue flowing when the capacity of your filter is exceeded. This lets unfiltered oil into your engine, which isn't great, but it's better than not letting oil through ...

The two most interesting parts of an oil filter are the anti-drainback valve and the bypass valve. The anti-drainback valve, shown below, makes sure the filter traps oil when the engine isn't running.

Here, we're breaking down the aspects of the Amsoil Dual Bypass Oil Filter: what they do, how they do it, and how they can benefit your 4x4 truck on the ohv trail. More inside Four Wheeler Magazine.

We visited five different parts stores and rounded up sixteen oil filters ranging in price from $2.99 to $13.99 ... The pressure relief valve is also sometimes referred to as the bypass valve.

Want to take the best possible care of your vehicle? Learn all about oil filters and when and why your car needs an oil filter change.

The companies that sell oil bypass filter kits claim decreased engine wear, longer oil life, higher oil capacity, and better fuel economy. To be sure, most of those are without debate.

Newer reefers typically use combination full-flow and bypass oil filters and CJ-4 oil, ... Rotate the valve a quarter turn, spin off the oil filter and be sure the gasket comes off.