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Quick Specs

  • Size:2-5/8" (66.7mm)
  • Type:Mechanical
  • Range:0-100 PSI
  • Lighting:Incandescent
  • Instructions: Download PDF


The life blood of your engine, a lack of oil pressure is one of the most catastrophic scenarios that can happen. Knowing the precise pressure is critical to both its longevity and performance, as well as your peace of mind. AutoMeter’s Mechanical Oil Pressure Gauge utilizes the most advanced bourdon tube meter movement on the market to deliver accuracy and durability you won’t find anywhere else. A simple 1/8” NPT connection makes installation easy. Fittings and nylon tube are included and optional braided stainless line kits are available.
Feature Points
  • Traditional incandescent lighting illuminates around the perimeter of the dial
  • Liquid dampened movement provides smooth pointer movement and extended service life in harsh environment applications.
  • Liquid filled design for superior resistance to shock, vibration, and the elements.
  • AutoMeter’s race proven mechanical instruments provide trusted accuracy while being simple to install
  • Gauge kit includes 1/8” nylon line, 1/8” NPT compression fittings, 1/4” NPT adapter, bulb and socket assembly, red and green bulb covers, mounting hardware, and detailed instructions for installation
  • No electrical system required for gauge operation - compatible with every street or race vehicle
Ships With
  • 1/8" NPT Male to 1/8" compression fitting, 1/8" NPT Female to 1/8" compression fitting, 1/8" NPT to 1/4" NPT bushing
  • 3245
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What is the nylon tube length that come with gauge?

Asked by: Naoto
Thank you for your question. This gauge comes with 10 ft of nylon tubing.
Answered by: Alex at AutoMeter
Date published: 2024-04-29

Hi. I have an older liquid filled oil pressure gauge that I refilled several years ago with glycerin. It has now turn dark. Is there a safe way to clean the gauge out and refill it with the liquid silicone that you mentioned earlier?

Asked by: Mike0905
Please call us at 866-248-6357 to discuss properly filling this gauge.
Answered by: Jim from AutoMeter
Date published: 2023-07-10

Does Autometer make a 2-5/8” Pro Comp  oil pressure gauge with lower than 100 psb

Asked by: john123
Thank you for your question. No, we do not have an oil pressure gauge lower than 100psi available in the Pro-Comp series.
Answered by: Zach from AutoMeter
Date published: 2019-07-24

Is it possible to re-fill these meters, and if so whit what kind of oil?

Asked by: Karsten
Hi Karsten, the liquid filled gauges use a 350cs liquid silicone. It's usually difficult to source in small quantities, but is often used for shock absorber fluid in radio controlled cars and can be sourced in smaller quantities from hobby shops.
Answered by: Matt from AutoMeter
Date published: 2019-09-07

Need the light that goes in gauge 5421 where to get one 

Asked by: Alzer
Hi Alzer, thank you for the question. If this is a fairly current gauge with a 5/8" diameter hole in the back for the socket, it will use bulb and socket model 3211. If you have a smaller hole and/or a hole with a rubber grommet, we no longer offer this style socket and your gauge will require some modification to accept the current socket. If you have the older style, give us a ring at 866.248.6356, hit the Chat link at the top of the page or you can email us here for additional information.
Answered by: Matt from AutoMeter
Date published: 2018-07-02
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