Stewart Warner Oil Pressure Gauge Value Guide

This Stewart Warner oil pressure gauge is a quintessential piece of American automotive history, widely recognized for its use in International Harvester Loadstar trucks and heavy machinery. Its mechanical 0-80 PSI range and iconic black-and-orange interface make it a highly sought-after component for authentic mid-century vehicle restorations.

What Is Stewart Warner Oil Pressure Gauge Worth?

The typical price range for Stewart Warner Oil Pressure Gauge is $45 - $50 based on recent sales. However, values can vary depending on the item's condition, rarity, and other factors such as:

• The clarity of the glass and the lack of pitting on the chrome bezel significantly impact the $45-$50 price point.
• Operational status of the internal mechanical movement, ensuring the needle responds accurately to pressure changes.
• Cosmetic condition of the orange needle, as these are prone to fading or chipping over decades of industrial use.
• Presence of original mounting hardware and the condition of the rear connection threads.

How to Identify Stewart Warner Oil Pressure Gauge?

• Verify the 'Stewart Warner' branding and 'Made in USA' text typically located at the bottom of the black dial face.
• Look for the distinct high-contrast orange needle and the specific 0-80 PSI scale increments used between 1960 and 1975.
• Check the rear of the steel housing for the mechanical threaded port and original mounting bracket hardware.
• Inspect the chrome bezel and glass lens for the period-correct flat profile rather than modern domed replacements.

History of Stewart Warner Oil Pressure Gauge

Stewart Warner was founded in 1905 and became the premier manufacturer of vehicle instrumentation in the United States. This specific 80lb gauge design was a staple in heavy machinery, trucks, and classic American automobiles during the mid-20th century, particularly used in International Harvester Loadstar trucks and industrial equipment.