Can I idle All Night with a quarter tank?

2016 kenworth uses just over ½ a gallon an hour idling.

 

Dunno. How big are the tanks?

 

You probably don't want to get down to less than 20 gallons left in your tanks so you can drive, instead of walk, to the nearest pumps in the morning. Safe to figure 1 gallon an hour if you idle at 800-900 rpm.

 

Yes...that needle won't even move.

 

Then easily, yes.
You can idle a lot longer than overnight on 75 gallons.
Most aren't actually empty, when the gauge says empty either.
Mine can read empty, and yet I drove another hour, and it was still running.
You can probably idle for 3 days on that much.

 

Even with 100 gallon tanks, you still have 50 gallons left with 1/4 showing.
Idling the truck does not take more than 1 gallon per hour.

 

If gauge is accurate yes….Id look inside tank,,,dip tank with a stick maybe. Never trust a fuel gauge if you not familiar with the truck. Had a truck 4 days last week gauge always read half or less even with them topped up

 

Depends how you're parked ... if you're leaning to one side you run the risk of emptying a tank.