Gotta love Tdi economy

[GoLfMan]

I haven't been game to run past 0km remaining on the computer. Never got more than 53L in so far. Anyone know how much the tank+expansion chamber actually holds? (how much further one could go in an emergency before running dry. I did run my first petrol car bone dry (carried a spare fuel can) to establish actual capacity. I understand it is not so good to run diesels dry but I thought I read somewhere that VW diesels have self-priming pumps.

Many moons ago getting a Greyhound bus from Brisbane to Melbourne, we got to Tugun and ran out of diesel 50yards over the road from the Shell station. (Someone forgot to fill up.) But we had to wait 3 hours for a mechanic to come to prime the injectors.

i wouldn't recommend running the TDI dry (or any other car for that matter)

i'm not sure how much it actually holds, I just know it a substantial amount (for such a small mod)

[bluey]

Ventectomy?

I tried looking at the links but any images are not there. Anyone explain what the process is?

Pics are there for me. I think you may have to join TDIclub to see the pics. Highly recommended to do that - loads of great information.

[CatonaPC©]

Okay, found them.

Not something I would do. All fuel expands, diesel as well. It would be naive to say it doesn't carry some risk.

[bluey]

Okay, found them.

Not something I would do. All fuel expands, diesel as well. It would be naive to say it doesn't carry some risk.

Have read *extensively* about thermal coefficient of expansion of diesel fuel via the TDI club and other references. Even petrol has negligible coefficient of expansion. Pressure is unchanged in the same conditions. There is no increased risk. Feel free to do your own research....

[chris.]

i wish i had a diesel

last one i got in at work the needle was a bit bellow 3/4 and it said 780kms left in the tank . . . my mouth droped

last time i messured i got 285kms to a tank & i dont really thrash my car






i dont bother mesureing anymore

[bluey]

[...]last time i messured i got 285kms to a tank & i dont really thrash my car

i dont bother mesureing anymore

Either that's a lot of stop-start peak hour driving or there is a serious problem requiring attention.

Worst fuel consumption I ever got was about 12mpg (23.5L/100km) in a holden 308 V8, caused by a sinking carbie float and consequently high fuel level. Improved to 17mpg (16.5L/100km) when fixed. Always worth monitoring fuel consumption. I'm guessing you're around the 17L/100km mark. What kind of car????

[Spoddy]

i wish i had a diesel

last one i got in at work the needle was a bit bellow 3/4 and it said 780kms left in the tank . . . my mouth droped

last time i messured i got 285kms to a tank & i dont really thrash my car

i dont bother mesureing anymore

I reckon its because you run your tyres too flat
---/=========\
(]/_ O _____ O _\[)
"'(O8o)=\X/=(o8O)
'|\===------===/|
[__|========|__] Too flat two flat

[OvaltoJetta]

Full tank

I put in 55.25 litres in after doing 1027.9 klm. It must have been up the spout.

[neil]

I usually put in between 52-54 litres each time.
I know they say not to let it get down this low so you don't pickup any s**t
but I have always had diesels and always let the fuel run down low without any problems.
I dont see the point in leaving s**t in the tank to build up over years of driving.
My thinking is to get it out as soon as possible,otherwise one day when you
get caught out with low fuel you might end up picking up a heap of s**t.

[tonymaroney]

1200klms?

The most I've ever got out of a single tank is just over 1,200km. It was a return trip from Brisbane to Coffs with all the family on board (5) including luggage for the weekend. This was in my 2.0 TDi Golf (soon to be upgraded to 125kW TDi Passat wagon).

Makes me laugh whenever I hear people say it's not worth buying a diesel car because it costs an extra 20c/litre over unleaded (more like 10c/litre over premium - which most cars need nowadays anyway). They will also tell you how many years it will take you to recoup the extra $$s spent in the premium you paid for buying a diesel car too...but they never take into account the higher resale figure!!

Also, my experience has been that with diesel cars it is fairly easy to achieve (or better) the fuel economy figures stated by the manufacturer...but with petrol cars it never is.

Really? 1200klms from a 2005 2L TDI Golf V DSG (103kW?). There is absolutely no way my 103kW 2L TDI golf can get anywhere near that. The best I could get was 960klm (5.6L/100klm) with 100% freeway driving, at about 100k/hr (actual speed, not speedo speed which is about 8% high for me...just under 110k/hr on speedo), being careful, two passengers, moderate luggage load and minimal a/c. Normal day to day (50% city and 50% freeway) I get about 800-850klms from about 52L (6L/100klm).
I'm happy with those numbers but I just don't understand how anyone can get >1100klms in this car?
I think my car is overfuelling (confirmed via a mechanic) and I might have a slight economy issue. I'm not sure what the overfuelling is caused by...maybe the MAF. Breaking the 1000klms barrier just does not seem possible in my car.
Do the other 103kW 2L Golf V TDI owners get >1000klms from a tank regularly when on long hauls?

Tony

[CatonaPC©]

Do the other 103kW 2L Golf V TDI owners get >1000klms from a tank regularly when on long hauls?

I've gotten 920km on a tank before the fuel light came on; with a load on board and aircon going, but I wasn't driving withy economy in mind.

I could have gotten 1000km if I tried. 1200km sounds doable but there would be a multitude of factors having to go your way to get that figure.

[neil]

Really? 1200klms from a 2005 2L TDI Golf V DSG (103kW?). There is absolutely no way my 103kW 2L TDI golf can get anywhere near that. The best I could get was 960klm (5.6L/100klm) with 100% freeway driving, at about 100k/hr (actual speed, not speedo speed which is about 8% high for me...just under 110k/hr on speedo), being careful, two passengers, moderate luggage load and minimal a/c. Normal day to day (50% city and 50% freeway) I get about 800-850klms from about 52L (6L/100klm).
I'm happy with those numbers but I just don't understand how anyone can get >1100klms in this car?
I think my car is overfuelling (confirmed via a mechanic) and I might have a slight economy issue. I'm not sure what the overfuelling is caused by...maybe the MAF. Breaking the 1000klms barrier just does not seem possible in my car.
Do the other 103kW 2L Golf V TDI owners get >1000klms from a tank regularly when on long hauls?

Tony

I'm on the Newcastle/Sydney Fwy 95% of the time and constantly get
over the 1000km range and if I keep it to 90km/h for the whole tank I have
been able to easily reach 1200km.

[gldgti]

Really? 1200klms from a 2005 2L TDI Golf V DSG (103kW?). There is absolutely no way my 103kW 2L TDI golf can get anywhere near that. The best I could get was 960klm (5.6L/100klm) with 100% freeway driving, at about 100k/hr (actual speed, not speedo speed which is about 8% high for me...just under 110k/hr on speedo), being careful, two passengers, moderate luggage load and minimal a/c. Normal day to day (50% city and 50% freeway) I get about 800-850klms from about 52L (6L/100klm).
I'm happy with those numbers but I just don't understand how anyone can get >1100klms in this car?
I think my car is overfuelling (confirmed via a mechanic) and I might have a slight economy issue. I'm not sure what the overfuelling is caused by...maybe the MAF. Breaking the 1000klms barrier just does not seem possible in my car.
Do the other 103kW 2L Golf V TDI owners get >1000klms from a tank regularly when on long hauls?

Tony

overfuelling in a diesel is more "throttle". how do you dirve? plenty of exercise ofr the rings? you really have to load em up now and then to keep good cylinder bores (no glasing) and get hte best from the engine.

[BeigeJet]

Really? 1200klms from a 2005 2L TDI Golf V DSG (103kW?). There is absolutely no way my 103kW 2L TDI golf can get anywhere near that.
Do the other 103kW 2L Golf V TDI owners get >1000klms from a tank regularly when on long hauls?

Tony

Hey Tony,

Best I've got in in my Jetta so far has been 1,105km on 49 lt, with 3 adults and luggage from Dubbo to Maclean to Byron Bay to Woodburn (sth of Byron).
And I regularly get 850+ around melbornes stop start morning and evening grind. The Jetta's probably 150 kg heavier than a Golf to boot!,

Cheers,

Neil.

[tonymaroney]

economy

I think I have babied the engine too much when new which has in turn reduced some of my economy. I don't drive the car too hard and was having some smoke issues (well, brown particulate issues rather than black smoke) so I did an italian tune up and noticed an immediate improvement in the particulate level coming out the back. So I'm now being a little more full on with the throttle and the particulate discharge has remained a lot lower.
An experienced VW mechanic (not VW themselves) did notice the overfuelling and they checked the EGR valve and MAF for me. No real issues to report but the MAF might be acting up. The strange thing is that the very first time I took the car for a long haul (so less than 2K on the clock) I noticed the fuel economy meter reading an awesome number (about 3.9-4.2L/100klm average) and then it has changed for the worse and settled on about 5.2-5.6L/100klms now. I know those economy measurements are not accurate, but I would have thought they would be "consistently inaccurate"...so always reading too high or low. Rather than too low one month and then much higher from then onwards. So maybe that's the cylinders getting glazed over from the engine being babied.

I also think that 90km/hr economy (as opposed to 110km/hr) would boost my numbers. Over xmas I'll be doing some long distance driving so I might have a chance to test out these ideas. But 1100-1200klms from 50L just doesn't seem likely. My 960klms was from about 52L if I remember correctly.

Tony