ISX 435 OIL PSI LOSS

[Hammerhead]

How 'bought a lil more info. Your Study leaves an aweful lot of unanswered questions, like;

Which version ISX you're running, 870, 871, 2250, 2350?

Has the motor been demandated, and if so what programming are you running?

Do you have any auxiliary oil filtration? i.e. an Amsoil bypass filter or a Spinner II?

When you changed filters, did you pull a sample and check soot levels?
Did you do samples at 12k miles when you changed crankcase oil?
When you changed crankcase oil, what was the oil pressure with new oil and filters? What did it drop to when you determined to change filters? What did the oil pressure increase to after changing filters, but not crankcase oil?

Through all of this, what kind of average torque load was the engine under? As in, what sort of GVW were you typically running, and what was your average fuel economy during this Study?