Originally Posted By: Hessam
So Wix not listing the 51348 as a full flow filter, but listing the 51516 as a full flow filter is just an oversight on their part? I understand that the 51348 is not a by pass filter, but was wondering if there might be a category of filter between a full flow filter, and a by pass filter, whereby some of the clean oil is returned to the oil sump and some of it gets routed to lubricate the engine / bearings.
I think they just left the field blank on the 51348 info. If all oil that goes into the filter also comes out of the filter, then it's a "full flow" filter.