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  #1  
Old 01-10-2015, 09:44 AM
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How low (fuel tank) have you dared to go?

My last fill was 23.4 gallons on the ecodiesel.

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Old 01-10-2015, 09:57 AM
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Re: How low (fuel tank) have you dared to go?

Last fill; 22.097 on a V6.
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Old 01-10-2015, 09:59 AM
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Re: How low (fuel tank) have you dared to go?

This thread might interest you:
How many miles have you driven on a single tank?
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Old 01-10-2015, 10:04 AM
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Re: How low (fuel tank) have you dared to go?

I rarely let mine drop below a half tank... especially in winter.
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Old 01-10-2015, 03:35 PM
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Doesn't the fuel pump run overly warm when running on a low tank?
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Old 01-10-2015, 05:47 PM
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Re: How low (fuel tank) have you dared to go?

I have heard about the fuel pump cooling thing and may or may not be valid. In any event I try to fill up at 1/2 tank and not drop below 1/4 without a reason. (Like coming back from Boynton after Sam's has closed).

If the Ross ice shelf breaks off and Florida starts to become an island I want to be ready.
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Old 01-10-2015, 06:46 PM
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Re: How low (fuel tank) have you dared to go?

I got an eco diesel and go til the light comes on and not too far after that. If there is a design defect that requires me to fill up at a half or quarter tank then I want to find out under warranty. If it's truly a defect this rig isn't worth keeping long term.


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Old 01-10-2015, 07:21 PM
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Re: How low (fuel tank) have you dared to go?

Quote:
Originally Posted by Chieftain View Post
I got an eco diesel and go til the light comes on and not too far after that. If there is a design defect that requires me to fill up at a half or quarter tank then I want to find out under warranty. If it's truly a defect this rig isn't worth keeping long term.
Defect? Nah...

If you live in a cold weather state you should keep your gas tank above half full at all times. Condensation can build up in a near empty gas tank in extremely cold temperatures, which can cause fuel line freeze up and your vehicle not starting.

It doesn't matter whether you're running gas or diesel... but I'll leave it to you to guess which one will be harder to get running if you encounter that problem.

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Old 01-10-2015, 07:49 PM
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Re: How low (fuel tank) have you dared to go?

Quote:
Originally Posted by MDBones View Post
I rarely let mine drop below a half tank... especially in winter.
+1.
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Old 01-10-2015, 08:18 PM
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Re: How low (fuel tank) have you dared to go?

Quote:
Originally Posted by padgett View Post
I have heard about the fuel pump cooling thing and may or may not be valid. In any event I try to fill up at 1/2 tank and not drop below 1/4 without a reason. (Like coming back from Boynton after Sam's has closed).

If the Ross ice shelf breaks off and Florida starts to become an island I want to be ready.
The "fuel pump cooling thing" is as real as it gets.
But wait, it gets better. Some AWD cars, like the turbocharged Subaru, have a saddle type fuel tank that "mounts" the driveshaft from gearbox to the rear differential. Subaru have 2 such pumps, a primary responsible for the fuel pressure and delivery to the engine and a secondary one that works to balance the fuel tank and hence the car between the two sides of the fuel tank. So one stands to damage 2 pumps when driving low on fuel and subjecting the car to accelerations and G-forces that shift the fuel away from the pump. Which looks like a bucket in the Subaru and it is not located on the bottom of the tank...
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Old 01-11-2015, 01:48 AM
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Re: How low (fuel tank) have you dared to go?

Quote:
Originally Posted by f1anatic View Post
The "fuel pump cooling thing" is as real as it gets.
But wait, it gets better. Some AWD cars, like the turbocharged Subaru, have a saddle type fuel tank that "mounts" the driveshaft from gearbox to the rear differential. Subaru have 2 such pumps, a primary responsible for the fuel pressure and delivery to the engine and a secondary one that works to balance the fuel tank and hence the car between the two sides of the fuel tank. So one stands to damage 2 pumps when driving low on fuel and subjecting the car to accelerations and G-forces that shift the fuel away from the pump. Which looks like a bucket in the Subaru and it is not located on the bottom of the tank...
The 2014/2015 JGC have left/right fuel tanks. How does JGC handle the filling and engine fuel supply with this L/R setup?
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Old 01-11-2015, 01:53 AM
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Re: How low (fuel tank) have you dared to go?

Quote:
Originally Posted by MDBones View Post
Defect? Nah...

If you live in a cold weather state you should keep your gas tank above half full at all times. Condensation can build up in a near empty gas tank in extremely cold temperatures, which can cause fuel line freeze up and your vehicle not starting.

It doesn't matter whether you're running gas or diesel... but I'll leave it to you to guess which one will be harder to get running if you encounter that problem.

Although I try to always have more than half a tank of gas anyway (never know when grid will go down and gas can't be pumped from underground), I heard that winter gas tank condensation is only an issue with metallic gas tanks (other than nearly empty tank of any material). Is this correct?
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