Oil Pressure - What should it be? have a dual guage built

[buster0984]

I'm having a dual Oil pressure/Oil Temp gaul built (pressure on the needle and temp digital). I never gave much thought to pressure but what should have I have the range on the gauge go from. example 0-160 PSI...more or less?

thanks in advance guys. i'm getting my guage setups together.

going to have:

-Oil pressure/temp combo
-EGT/AFR combo
-AEM Tru-Boost electronic boost controller gauge

any others that you would suggest. my plans have room for 4 gauges and i'm at 3 right now so i can add 1 mor (with the possibility of making it a combo dual read out)?

thanks again!