New Ibiza TDI MPG!!

[garybuttle]

Xreyuk, as I stated in my previous post you have to hold the revs at 2000 for 15 mins to cause a passive regen(the exhaust heats up and burns the soot basically, you do not have to rev it to blow the soot out) and I personally do not class 2000rpm as high revs.Acceleration does nothing for the dpf unless you hold it in any gear at 2000rpm for 15mins.
Yes I do drive on dual carriageways at 70 mph most times as this equates to 2000rpm in top and therefore does a passive regen so I do not get the light on , but my journeys are only 30 % dual carriageway. you can equally well cause a passive regen by driving at 30mph in the appropriate gear(2000) for 15 mins.

 

[Biker]

****in hell mate, I was only saying what I'd been told.

I do like it when someone comes up with a well thought out, well reasoned reply

If you would care to look past the sarcasm of my last post, there is a point to it. You have come on the forum having owned your car for three weeks and armed with some gossip from a mechanic and something you read, you are now a DPF expert. You are telling people who have driven a DPF equiped car for many thousands of miles how we should be driving our cars and where we are going wrong, even though most of us have no issues at all.

I stand by what I first said, driving slower will not cause the DPF to choke up any quicker. Based on what I have read the biggest problem with a DPF equiped car is doing lots of very short journeys.

 

[nightflight]

That above 2000rpm for 15 minutes is to perform an ACTIVE regen of the dpf, by altering the injection timing etc to increase the exhaust gas temp.

A passive regen occurs constantly, and in an ideal world is the only kind of regen that would occur.

You DO NOT need high revs to perform a passive regen, what you need is exhaust temp, and on short journeys you just do not get the exhaust temp high enough to perform a passive regen.

So when you combine the short journey times, with low rev driving which not only doesn't produce as much heat but also produces more soot (remember those dirty older diesels which would dump a load of soot out the back when booted from low revs? all that crap is whats blocking up your dpf) it's a recipe for dpf-saster.

you can get sufficient exhaust temp from a low rev motorway cruise..as long as it's a long enough journey.

 

[Deleted member 74601]

I do like it when someone comes up with a well thought out, well reasoned reply

If you would care to look past the sarcasm of my last post, there is a point to it. You have come on the forum having owned your car for three weeks and armed with some gossip from a mechanic and something you read, you are now a DPF expert. You are telling people who have driven a DPF equiped car for many thousands of miles how we should be driving our cars and where we are going wrong, even though most of us have no issues at all.

I stand by what I first said, driving slower will not cause the DPF to choke up any quicker. Based on what I have read the biggest problem with a DPF equiped car is doing lots of very short journeys.

I was only trying to be helpful, yet you jumped down my throat, I do not think I am any kind of expert at all. I never claimed to be an expert, all I was doing was saying what I'd been told, I was not disagreeing with you, or with anyone else, simply passing on information that I'd been given, and if it was wrong, someone could have corrected me. That's it.

I'll just keep my mouth shut in future and not try to give anyone help.

Also, I never said driving slower, I said low rpm in and around town.

 

[nightflight]

tbh the DPF thing has been done to death on here, hence the FAQ thread dedicated to it.
In short:

Booting it from low revs (the kind of thing that has black cabs and tranny vans dumping soot out the back) blocks the DPF up quicker as it's the DPF that catches all that crap, but the DPF will get filled up progressively under normal driving anyway.

The engine naturally does a PASSIVE regen whilst your driving all the time (aslong as the exhaust gas temp is high enough) if you drive carefully and for long enough
the rate of soot production:rate of dpf clearing

If you do lots of short journeys then the exhaust temp never gets high enough to do a PASSIVE regen.

This is when the engine attempts an ACTIVE regen, the idle revs raise to 1000rpm and the injection timing is altered slightly to get the engine and thus exhaust temps running hotter.

If you don't let the ACTIVE regen complete properly, after a few attempts the warning light will come on, now you really have to do an ACTIVE regen, the full 2-2.5k rpm for 10-15minutes, like NOW, IMMEDIATELY, "sorry i'm late boss, had to take my car for a thrashing" not think "i'll leave it til later" as later will tend to involve limp mode, a trip to the dealers and if you're lucky a FORCED regen (0.5-1hr of labour charges, some dealers are nice and will let you off your first one..others wont) or if you've really pushed your luck, new DPF time at over a grand a piece.

Light come on and you're stuck in town? don't panic, you use a lower gear than usual and just keep your revs in the 2.5k region, when stopped at lights, keep the revs on, yep, you'll look like a **** but it's better than the alternative, make your way to somewhere you can do a DPF run (doesn't have to be a dual carriageway, I use Snakes Pass as I can happily sit at 40mph at 2-2.5k rpm) chances are the light will be off before you get there!

 

[InDeNiaL]

I've got the 1.6 TDI and got 69mpg once (on a very long run and I was doing 50mph). I normally get anywhere between 40-60mpg. Normally the car starts at about 30mpg and creaps up.

 

[evoy2k2]

My second £20 top up and the petrol light has come on at 115miles :-/

Looks like i'll be spending more money on fuel than my peugeot 307hdi which i was getting 54mpg!!!

 

[Deleted member 62899]

My second £20 top up and the petrol light has come on at 115miles :-/

thats a shame, I thought it was DIESEL

I fill up to the brim after about 460 miles - can't muck about puttin trivial amounts in

what I have noticed is the prices have gone silly after the governments mention of a strike,
£1.41.7 to £1.45.9 in a month ffs

 

[evoy2k2]

Ive managed to get up to 145miles but ive got 1 block left on petrol indicator so best fill up 2moz !

 

[skeat12]

thats a shame, I thought it was DIESEL

I fill up to the brim after about 460 miles - can't muck about puttin trivial amounts in

what I have noticed is the prices have gone silly after the governments mention of a strike,
£1.41.7 to £1.45.9 in a month ffs

I paid £1.54.9 yesterday for V-power. I had a v-power club voucher, so got £7 off the price.

One local garage is £1.50.9 for standard diesel..........bloody rip off

 

[markmeus]

My second £20 top up and the petrol light has come on at 115miles :-/

Looks like i'll be spending more money on fuel than my peugeot 307hdi which i was getting 54mpg!!!

The fuel light comes on when there are around 50 miles left in the tank. So we can assume that you are getting 165 miles out of £20. If diesel costs 147.9 a litre (it does near me) then that is 13.5 litres.

Which believe it or not works out at 55.47mpg!!!

 

[evoy2k2]

The fuel light comes on when there are around 50 miles left in the tank. So we can assume that you are getting 165 miles out of £20. If diesel costs 147.9 a litre (it does near me) then that is 13.5 litres.

Which believe it or not works out at 55.47mpg!!!

Diesel near me is 141.9 a litre and ive done 145 miles and ive got 1 small bar left on my fuel indicator on the dash.....i cant see how many miles ive got left as car hasn't got a trip computer!!

 

[markmeus]

Well on my car the light comes on at 45-55 miles. Depending on how I'm driving, so it would be the same on yours if you had a trip computer.

I would say your £20 quid is probably getting you around 160 miles. And if your diesel is only costing 141.9 (Northern Ireland is such a rip off) then you're getting approx 51mpg.

Best way to work it out would be to fill it up though, as you'll be getting a better mix of driving styles on a full tank, and I find the Ibiza economy is very sensitive to a lot of variables.

 

[evoy2k2]

Well on my car the light comes on at 45-55 miles. Depending on how I'm driving, so it would be the same on yours if you had a trip computer.

I would say your £20 quid is probably getting you around 160 miles. And if your diesel is only costing 141.9 (Northern Ireland is such a rip off) then you're getting approx 51mpg.

Best way to work it out would be to fill it up though, as you'll be getting a better mix of driving styles on a full tank, and I find the Ibiza economy is very sensitive to a lot of variables.

Yeh well i might fill it up 2moz...how much is it to fill up a 1.2 TDI...It'll be first fill up as ive only had car nearly 2 weeks!

 

[markmeus]

Should cost around £60 to fill.

 

[evoy2k2]

Yeah i'll more than likely fill up tomoz.....Im sure the tank is 45litres capacity!

Does the car as its new need wearing in??

 

[markmeus]

Generally people say new cars don't really need run in anymore - but it would do no harm to take it easy for the first 1000 miles, bascially just not revving the crap out of it and you'll be grand.

MPG will also increase as the miles do. If it's already doing 50mpg then you're off to a good start. Some people with 1.6 TDIs still struggle to get over 50mpg! Thankfully mine will 60mpg easily if i drive carefully.

 

[evoy2k2]

Ive calmed down alot in terms of thrashing the crap out of it, i drive sensible now as its mine and the other halfs car now !

One thing i dont wana keep doing is letting my last 50 miles get to around 10 as i'll clog up all the crap. By time i get to petrol station tomoz id of done around 150miles

 

[evoy2k2]

Ive filled up and it cost me £58 and just over 40 litres !

 

[gaffer1986]

I believe cars still need breaking in. I've done 30000 miles in my 1.6 TDI CR - economy hasn't improved however performance has. It seems much more eager than it used to be.