So in comparing a lot of aftermarket oil filters to OEM oil filters for my Subaru and Ford I got to wondering (again) about the relief valve opening pressure. Do OEM filters have a range like aftermarket filters? Or, do aftermarket filters have a range of PSI because they aren't built for just one specific car?
For instance, for my Ford F150 the applicable PureOne (PL24651) has a relief valve PSI of 8-16 PSI. Does that mean that the valve starts opening at 8 PSI and is fully opened at 16 PSI?
For instance, for my Ford F150 the applicable PureOne (PL24651) has a relief valve PSI of 8-16 PSI. Does that mean that the valve starts opening at 8 PSI and is fully opened at 16 PSI?