D318 oil pressure

Have a #12 grader 8T with oil clutch. New bearings and reground crank. It's showing 25lbs at full speed.
Is this in the normal range?
Thanks

sounds about right, those old engines had fairly high flow oil systems and with the large clearances, oil pressure would'nt be quite so high, what is pressure at idle? anything above 5 lbs at idle is probably good, i'm sure someone has the specs and will correct me if i'm wrong.

oil viscosity and temperature make a difference when checking oil pressures.

Running middle of the green on original gauge with 15w40 oil. Before anybody jumps on me for running detergent oil, I had this engine down to bare block. No sludge or crap to come loose.
Thanks

I was reading my servicemans reference manual while I sat in jury duty today. ( no kidding)
" the oil pressure at the bearings is limited to approximately 30 psi at rated engine speeds"

I was interested to read the oil pressure is variable, compared to most I have been familiar with in automotive world, which are based solely on RPM.

SAE 30 detergent oil is what was originally specified.

My family's experience with diesel engines goes back to 1934 with a Cat 35D. Cat was not using a detergent oil if it was even around and the 35 had oil consumption problems from new. From the experiences in the early days of diesel engines it was pounded into me always run a high detergent oil.

This engine was overhauled several time to fix the oil consumption as the dealer had made grandpa a deal to bring others to drive this tractor as a demonstrator. So the oil consumption was of major concern to the dealer. The real fix came with complete set of sleeves,pistons,and rings, proper break in (varying load at varying rpm the first several days with no lugging ever) and a high detergent motor oil.



On a more pertinent to matter at hand of the question on oil pressure. Neighbor that has automotive machine business always reminds me high performance V8 racing engine will live very well on 7 psi. Just that we have the a little is good more is better mentality. One of the reasons oil pressure gauges don't have numbers.