Uploaded November 2024 | Updated September 2026, 55 minutes ago

---

Today we're checking out a Gas Master vacuum gauge from Automotive Research Corp.
This would have been installed in a car, and has a primary dial to show engine vacuum in inches, and a secondary dial for instantaneous miles per gallon.
Vacuum gauges were popular in the 1970's as a fuel saving gimmick.
The gauge won't help you save fuel by itself, but it can train you to be lighter on the throttle when driving, thereby saving fuel.

Join this channel to get access to perks:
youtube.com/channel/UCqlO54ZdQjkkjpgD1yWaWgQ/join
Chapters:

00:00 Overview
01:19 Testing
02:09 Factory Gauges
02:50 Other Types
03:21 Outro