ya im thinking its year specific. So far my few hours on youtube have landed me with years of 05-06 that have the increased oil pressure at higher RPMs. Reason I ask is because Ive noticed my titan does that as well. I did a search on here, and found only threads about low or fluctuating oil pressures. My oil pressure stays at the mid line all the time, unless I raelly get into it. Runs good, nothing wrong that I can tell of. Just interested in knowing if this is common.
Assuming everything is working properly, it mostly depends on what weight oil you are running; also if the truck is warmed up. With a 5W-30 syn, it tends to stay mid, anything much heavier will make it climb in the higher revs.