Venting the fuel tank

[Ibiza 130 tdi]

Been venting since new in dec.2003 now with 92K have still to find any adverse effects! Even when it hits temps like this about 10 days ago!!!

Manage to put over 60l in nearly everytime...

Been hot here today too!

Well, the proof is in the pudding - pics to prove.


Odometer readin in the bottom right (reset when fuel was put in)

I was getting 57.9 but the A roads were too much to resist.

 

[Ibiza 130 tdi]

And this one of when I filled up to come home (fuel was cheaper up there so couldn't resist.

417.9 miles on not even half a tank! (just)

 

[aaronbromley]

I filled my car up the other day with £30 of diesel. Which ended up being about 27 litres I think. The needle was on 3/4 of a tank when I filled it up yesterday. I vented the tank (not fully - could've vented it more but was getting bored ) and I got another £30 in!

The £30 before took it from 1/4 of a tank to 3/4 of tank. So basically by venting the tank I've got another half a tank in the space where 1/4 of a tank should be.

Last night I drove from Somerset (where I live) to North Lincs (Humber Bridge to be precise) on the vented tank. I did 80 mph pretty much all the way (apart from M1 roadworks and Birmingham average speed check zone where it was both 50 mph) and I AVERAGED 57.9mpg. I thought by venting the tank that I'd knackered the fuel gauge somehow cos it just was not moving!

Anyway - I got here and overall managed to average 57.6mpg (`A' roads and a few blasts knocked it down a bit).

But I managed to do the 250 mile journey on a needles width UNDER a full tank. So used about 30 litres of fuel? I'm guessing.

I took pictures on my phone last night and I will post pictures when I get back to Somerset. I just wanted to brag tbh cos I thought it was amazing how I managed to do the 250 mile treck with the needle moving literally 1-2mm.

Does anyone else want to challenge me and beat it?

It can take a while to vent it fully, i normally fully vent it if there are no cars waiting at the pump behind me. I drove from Lincolnshire to Great Yarmouth and reached there having done 65mpg average. I was very impressed!

 

[Deleted member 19188]

Does anyone else want to challenge me and beat it?

I'll give it a go - I'm off on a couple of thousand mile run around northern europe at the weekend and intend to vent the tank and see how I do when I get back . . .

Ragging it round the Nürburgring will probably not be very fuel efficient though !!

 

[danmay]

so is this a bad idea with petrol cars?

 

[CHR15B]

so is this a bad idea with petrol cars?

No, but it's more interesting on diesels as they're known to get good MPG.

Guys I my work yatter about it a lot ... I get this many miles to 50 quid etc.

I get 400 miles to my £40 and I'm happy with that... I don't drive like an old granny and I don't drive like Lewis Hamilton so it's all good.

Venting though and doing a long distance... I fill it right to the brim and sit at a consistant speed most of the way and get good mileage.

 

[danmay]

might give it a go the weekend when i go see the mrs, she lives about 100 miles away so i'll see if i notice any difference!

 

[Deleted member 19188]

so is this a bad idea with petrol cars?

Not a bad idea as such, but the expansion tank is there for a reason and petrol *can* expand more than diesel. In weather like we've got at the moment, I wouldn't bother trying to max it out unless you are going to put some miles under your wheels straight away.