700km to a Tank in a GTI!

[FLYINGTI]

soo. i didnt even know about this,
when are you ment to vent it?? after you get the first click or before u start filling??
how long do u hold the button for??

[kaanage]

How would this work? Until first click, until all vent space gone, until petrol is gushing out?

Either when it will click immediately with the nozzle fully inserted or until all vent space gone right to the neck (where petrol will be gushing out if you keep going with the fill trigger fully grasped).

Anything else is not going to give a reasonably precise measurement (right to the neck is better but not advisable for petrol cars if not going for a longish drive straight away).

when are you ment to vent it?? after you get the first click or before u start filling??
how long do u hold the button for??

You can hold down the button from the start and fill with it depressed but you'd better be on the ball else you'll get covered in fuel. It's better to fill to first click and then vent, then fill and vent with the nozzle slightly retracted.

Venting before filling and not holding down the btton wont do anything

You can tell when the tank has vented as you can hear the air rushing in (it sounds like the car is sighing).

[FLYINGTI]

does it degas any on its own thou??
like if your not doing this, your only going to get the standard 42-45 sorta thing ay

[Blitzen]

The best I have done so far is Braddon BP in Canberra to the BP at Wandong on the north side of Melbourne... A distance of 650km, and I was still showing 60km to empty with no fuel light on.

[Buller_Scott]

does it degas any on its own thou??
like if your not doing this, your only going to get the standard 42-45 sorta thing ay

to you, and to anyone else who has a question about the vent function: think of it like this - there's an air pocket at the bottom of the tank, and pressing the vent "knob/button" in the filler neck, releases air from the bubble. so, you fill up, the fuel nozzle will click, you press the button, you'll hear the air escaping whilst the fuel "sinks" lower down into the tank, allowing you to put more fuel in.

in my case, i usually vent about 3-4 times, filling up until the fuel comes right up, then venting for 10 seconds until the air stops escaping, then repeat.

the only thing is that they reckon you "shouldnt" use the vent function unless you're going to drive a hundred or so clicks before parking it in the sun etc etc (because of the gasses expanding).

[kaanage]

the only thing is that they reckon you "shouldnt" use the vent function unless you're going to drive a hundred or so clicks before parking it in the sun etc etc (because of the gasses expanding).

For petrol definitely - not much of a worry for diesels since the vapour pressure is so much lower .

[Stuwey]

I averaged 8.2 over my recent 3600km trip. Heavy foot, a/c on for most of it, cruising at 120.

43 degree weather and 50kmh head winds don't help!

[Eddy]

Hoyhoy.

Me didn't know this trick, might have to try it out.
A mechanic once told me that over filling beyond the first click of the bowser gun could do harm to the catalic converter,
I never did understand how or why.
Can anyone explain.