After some research along our forum and some other sitesin the web about how to read a vacuum gauge. I came with this one http://www.classictruckshop.com/clubs/e ... ac/uum.htm for example.
Now, what about our mazdas, what are your specs?
Mine does show a maximum of 25'' doing downwilll with engaged gear.
While the gauge marks go to 30'' maximum, should I be worried because of my lower readings?