Originally Posted by kstanf150
Originally Posted by FordBroncoVWJeta
I thought 19+ where the ones that use 0W-20 and 2018-under took 5W-40.
Also food for thought the Fram Ultra specs a 12PSI bypass while OEM and other German filters spec a 36PSI bypass. Does it matter? Dunno.
I've always been under the impression that bypass pressure is not an issue UNLESS you really neglect your oil changes and the engine suffers from sludge and junk
I'm I correct or way off base ?
For those of us who change on a regular bases and take care of our vehicles I don't think psi is an issue 🤔
The bypass valve setting is dependant on: 1) Expected oil viscosity, 2) Expected low temp start-ups, 3) Oil pump volume output, 4) Media flow restriction., and 5) How much headroom there is for debris loading before the valve opens under some of those conditions.
Depending on all those factors, it can certainly cause the bypass valve setting to differ between different cars and filters.