If you are considering gauges, if possible, buy good Autometer gauges. I was fooled into thinking I had a low oil pressure problem by a cheap gauge. I am a cheap guy, but I learned my lesson about cheap gauges. They will read fine in the middle of range, but especially at the low end of range, they are not accurate at all. Oh, and I also learned that Autogauge by Autometer is still cheap crap. Done fooled like I was.
Cley