I was reading the owner's manual last night as I just picked up my first diesel and it made reference to filling up that contradicted each other. One statement said to stop filling once you get to the first auto shut off and another said you can go to the second auto shut off.


In filling my gassers I would always go to the 1st auto shut off and then just manually put as much gas as I could in and never did the auto thing. With diesel when should you stop filling? tks

 

I've always just hopped in the truck while fueling, when it clicks I pull it out and drive off.

 

you can completely top off a diesel I believe, not so much for a gasser, you should always stop at first auto shutoff, or you could contaminate the charcoal canister with fuel, It can be costly to fix, replacement of the canister.

 

Like said above, getting every last drop in on a gasser will hurt the emissions systems over time. I didn't think the Diesel trucks had that, but I haven't looked closely at the new pick ups, it's quite possible they added a vapor collecting system to them as well. Or they just have it in general for both trucks.

 

My experience has been when you get the first auto shut off from the pump it's pretty darn full. If you try to put in more fuel you'll get it running over the top and dripping down the side of your truck. So if you're going to try to pack it full go slow. I just stop at the auto shutoff now.

 

On my '08, I could usually slowly pump in another 3-4 gallons after the first shut off.

 

The problem with keep filling is you overflow into the vapor collector, eventually clogging that up as the fuel won't evap out of the canister as often as you fill it up. If you've ever got into a car that seems to auto shut off all the time, it's likely a clogged line cause by overflowing too much.

 

That's only on gassers though, correct?

 

Diesel fuel is different from gasoline in that the fumes aren't terribly explosive. This negates the need for a canister to deal with the fumes.
Out of habit, always fill my truck up to the rim when I fuel up to track my fuel economy accurately. I've had a couple "Oh crap" moments where I've ran really low on fuel and that extra gallon or two had been what I needed to get me to the next service station.

 

I've always filled diesel up to the neck and never had a problem. It's my personality to maximize everything to the nth degree.

 

I did my first fill up yesterday at a propel station using the hpr stuff. When it auto shut off I tried putting more in and it would not take any and it was only 26 gallons? I got in the truck and it was full said 400 miles or something until empty. I though the fuel tank was larger than that but w/e not a biggy

 

Some pumps create a lot of foaming and it can make the auto shut off premature.

I always run the pump at its slowest setting and stop when it stops the first time.

When using the large nozzle pump be prepared for some blowback if it flows full speed and the shut off isn't sensitive. I've had the inertia of fuel flowing in the neck burst out back at me when it's full. Even if it auto shuts off it can come back on you. Another reason I pump slowly.

If you ever get an aux tank in the bed you can fill it to the rim but you have to wait for the foam to o away on the last couple gallons. If it's full and the sun beats on it there is quite a bit of expansion from heat and it will flow out the vent so watch out for that too.....in case you can't tell, I buy a LOT of fuel so it's hard for me keep quiet about it.

TL;DR- pump slow and don't top it off, foaming can be irritating.

 

This is a known issue with some long threads here. At zero miles to empty, most are reporting around 5 gallons of reserve in the tank. In other words, the gauge isn't reflective of the very large reserve for some reason.

--Nathan

 

It only applies to diesels.....sort of......
Diesels don't have vapors so there's no vapors emmisions on diesel vehicles, and therefore it makes no difference if you fill up completely to the top of the filler neck. The only drawback is diesel fuel expands with temperature, so if the fuel in the ground is say 55*F and it's 95*F outside, it could expand and pour out of the tank.

 

I've thought of that, however, I estimate that by the time I get home, or wherever I'm going I will have used enough fuel to compensate for the expansion.