Toyota's oil pressure specs will make you laugh, most of their stuff willgive a spec like 4.3psi-55 psi is considered OK.
Some 4 runners were made in different assembly plants than others I remember some of them when revved would let the oil psi gauge rise rapidly others rose much slower, typically there is nothing wrong.
I remember one time I had a moron of a service manager wanted to "fix" one of the ones that rose slowly because the customer had a friend that had a truck thatrose quickly, I told him "you could put all the senders/gauges in the world on it but its never going to change unless you lie about where it was made dufus", I dont know why most managers dont like me!
