[Marshall V. Daut]

Oil pressure in a Model A engine will be about 6-8 pounds when first started up, dropping fairly quickly to about 3 as it warms up. I agree that an oil pressure gauge in a Model A can become rather boring to watch for lack of needle movement, but the one advantage I can think of is that it will tell you immediately if the pump has failed = the needle will drop to zero. It's probably too late by the time you notice that, unless you glance at the gauge every couple seconds. But when has a Model A oil pump really failed while driving, unless the screen becomes so clogged with crud that the pump can't circulate oil? Once again, though, that's got to be a fluke incident.
Marshall