electric gauges not running analog gauges, will get a analog test gauge soon
Not really the correct usage of "analog". Analog can refer to the type of readout, basically a needle reading against a numbered face, like a clock or a speedometer. It can also refer to the signal that the gauge receives. A conventional electric aftermarket gauge reads the resistance of the sender and that is basically an "analog" reading. You can also say that the oil pressure running through the lines to a mechanical gauge is an "analog" signal. That's a pretty simplified explanation and just trying to make sure we are all on the same page.
What I know you are trying to say is you are using electrical gauges rather than mechanical gauges.
Which brings us to preference of one versus the other.
I use electrical gauges..... Two reasons. First, with oil pressure, is to keep the oil (hot and under pressure) out of the car interior. The plastic (usually) or copper lines can break or crack. I've seen and experienced the plastic line cracking up under the dash and it can be a real mess. Nothing like ruining a few hundred dollars of nice new carpet to spoil your day.
Second reason is ease of installation. Running a couple of wires is a lot easier than routing a stiff bourdon tube for the temperature gauge through the firewall and up under the dash. Oil pressure is a little easier, but you have to be careful, just like the temp gauge tube, about kinking or cutting the tube.
Now, let's talk about accuracy....
Face it, automotive aftermarket gauges are junk. It's all about price point and how they look. I have never found any statement of how accurate an aftermarket gauge is from any supplier... With one exception, and Autometer does list a "better that 2% accuracy" for their high dollar stepper motor gauges. That means a 100 PSI gauge will be accurate to +/- 2 PSI. Nothing stellar about that.
Every other industrial or test gauge manufacturer on earth will list the accuracy or at least the accuracy class.... Except these guys.
So..... What is more accurate? I don't know. The "wive's tale" is that mechanical gauges are more accurate, but I've never seen real data to prove it. I do believe that the mechanical gauges are more "robust" and they have the advantage of giving a reading without the ignition on. The electrical does have a separate sender, so the accuracy is a combination of the sender and the gauge movement. I lean towards the electrical gauges being more accurate, but that's only a halfassed opinion, based on the third world being able to make better cheap electrical stuff over cheap mechanical stuff. Truth is probably that one is just as accurate as the other in this application.
IMHO, the gauges in your car are for reference and that's it. You want to see changes and trends. If you prefer electrical, as I do, that's great. If you prefer mechanical, that's fine too. Just statements of one versus the other are based on lore or personal experience and not on any written accuracy specs from the gauge makers.
My suggestion of using a cheap mechanical gauge to verify your oil pressure is based on the word "cheap" followed by "easy". It would be fairly easy to hook up in your garage and is a great diagnostic piece to have in your toolbox for the future. Buying another electrical gauge and sender doesn't fit my version of "cheap", so I didn't suggest it.
Then again... What do I know....
