WTF?? Fluctuating oil press

[94stroker]

hello everyone,

i've noticed that my oil pressure gauge fluctuates all the time. sometimes it will be by the "N" normal and sometimes it ranges middle or higher. as the truck gets warmer, it always increases more, but recantly its been staying on the lower side. is this the sending unit failing or are there bigger problems i should be worried about(pump)

btw the truck is a 1994.5 powerstroke 5 speed with 198K

[GETERDID]

id check your gauge first