Weight

You'll need to actually scale with a fully gross on the axle to know where your gauge reads.

We can give you an idea but trucks don't always read the same number.

You may not get the same number someone posts on here. But you'll have an idea anyways.

It's a habit you need to do anyways every time you're in a new or different truck with a gauge.

 

Yes they all weigh in similar fashion. Just may not be the same reading.

 

IIRC. The last FL I drove. 16 model. Had a fuel gauge.

IIRC.

I want to say air filter also.

 

Mack pretty much got it right on the fuel filter guage, if mine gets close to 10 I change it, but I generally change it before it ever gets close.
The air filter gauge works much the same, but on vacumn, the higher it is the more stopped up she is, a lot of them air gauges seem to never move at all even when the filter needs changed bad.

My kw has two suspension gauges, and all the stars have to line up perfect for them to read equal, so it is hard to go by for my weight, my freight shaker shows between 85 and 90 when I have 38,000 on the drives, but I have electric scales on it too.
NOW that gauge will give you a false reading and enough to get you a ticket if you are not on pretty level ground and move it back and forth a time or two then let it settle a minute after loading. I had them on my trailers too, and once a guy gets used to them, I rarely ever went to a cat scale.