it would be if you had a problem (your idiot light only comes on when you are on battery power and under 12 volts aka stranded)
For the average driver/modder, fuel pressure is good, but not necessary in my eyes. It is when you start doing hard core modding and tuning that you need fuel pressure. For me on my daily driver, it is not necessary. If I am working on something that I need to know fuel pressure, I can rig something up for awhile.
As for voltage, yes, it is nice to know. But I typically don't need a volt meter. Only once every 5-6 years, when my battery or alternator starts getting weak will I need to look at the voltage. And again, I can deal with that when the time comes.
But oil pressure is important. It is the life blood of your engine. If you don't have oil pressure, you don't have an engine that will run very long. And if you have a gauge, you can watch it and know when something is starting to go wrong by the oil pressure will start to decrease. I think oil pressure is one of the most important gauges that every car should have.
As for the other gauge I choose, trans temp, I am just anal about my transmission. I am so worried that it will take a dump and leave me setting. So I have a cooler installed. Change fluid religiously. And watch the temps like a hawk. So this was not an option for me. I needed the trans temp gauge.
Boost/Vacuum is just fun to watch :th_thumbsup-wink: