Re: Oil filters and engine oil

Posted by Jack Vines On 2010/8/20 12:43:46

The restriction which limits the oil flow to the bypass filter is in the brass fitting, not the filter. Even if no element is in the canister, the oil flow in is the same.

Some '50s OEMs used a replaceable element in a cannister as part of a full-flow system. Others used the same element in a canister as a bypass system. Both worked equally well.

FWIW, the only time a bypass isn't as good as a full flow is if someone dumped some grit into the oil system. The full flow would trap the grit before it got into the bearings until the filter element became plugged and then would bypass the oil with the grit in it. Under normal conditions, a bypass filter works just fine.

jack vines