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E85 and P3 gauge

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Old Jan 24, 2026 | 03:40 PM
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Default E85 and P3 gauge


Has anyone installed this for your car? Watched a couple videos and bought the additional OBD SPLITTER. The tuner will tune out the AFM so I won’t need the Range to be plugged in.

if you installed or are using this gauge what did you think about the install (how long did it take and was it a pain to do) and if using is it easy to use and is it accurate?

I bought primarily to see e85 ethanol percentage in the fuel tank.
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Old Jan 25, 2026 | 09:19 AM
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installed it in mine. its a fairly big job in terms of the chances of breaking clips off the dash are present. mine is a carbon fiber dash so replacing that isnt cheap. you start at the center console and everything from there up the console across the dash all the way to the vent has to come out. install is the reverse. in the end the p3 gauge is awkward to use your hand covers the gauge as you scrolll (push the pin) so you have to push look push look etc. if the pins were on top of the gauge it would be easier. also you cant go backwards so if you pass the pid your looking for you have to start all over. and lastly only 1 pid at a time so your constantly scrolling to look at data. if I had known what I was getting vs the effort to install it I would have passed. as for accuracy it is only reading what's in obd and showing that on a screen it does nothing individually. so if the e85 analyzer reading is off the p3 will read it as off
banks I gauge in a traditional gauge pod works way better
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Old Jan 25, 2026 | 03:19 PM
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I like it. I think it took me 3 or 4 hours. There is quite a bit to take apart.
I installed it in the existing AC vent without issue.
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Old Feb 15, 2026 | 04:09 AM
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I went with the fuel-it analyzer, hooks to the adapter then Bluetooth to cell phone. Although it will depend on what adapter you have, I remember reading that it no longer works with dsx (prob to make you buy theirs)




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