Diesel Consumption

Submitted: Thursday, Feb 19, 2004 at 09:07
ThreadID: 10639 Views:1131 Replies:9 FollowUps:1
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Has anyone experienced sub-standard diesel through the major outlets. I have a GQ '91 that consistenently gets 22-23 mpg. Over the last 3 fills the consumption has dropped to 20mpg.
All the filters and injectors have been changed within the last 6 months.

I was talking to the local diesel injector guy on the Gold Coast and he said the quality of the diesel has dropped off.

Thanks in advance
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Reply By: Roachie - Thursday, Feb 19, 2004 at 10:48

Thursday, Feb 19, 2004 at 10:48
That's strange....a few of us were only recently saying (see Post # 10,624) that the low sulphur content in diesel now, seems to have improved our consumption.
I'd be checking you fuel filter again......if you get one load of bum fuel, the filter can go phut real quick and subsequent loads of good fuel won't fix the problem. I have gone over to a cheap CAV filter with glass bowl and a Morrison's DeBug unit on my Patrol and my diesel is clean enough to drink (well maybe not quite).
Cheers,
Roachie
AnswerID: 47297

Reply By: Truckster (Vic) - Thursday, Feb 19, 2004 at 10:49

Thursday, Feb 19, 2004 at 10:49
Just buy from Brand name servos, steer clear of the Safeways, Lucky Fats etc crap.
AnswerID: 47298

Reply By: GUPatrol - Thursday, Feb 19, 2004 at 12:32

Thursday, Feb 19, 2004 at 12:32
Hi,

I noticed that too on my last two refills, I only fill up at BP (I got a BP card) and the last two refills although the fuel is nice and clean (I got a clear bowl) there is lack of power and increased fuel consumption.
AnswerID: 47311

Reply By: jeff-wa - Thursday, Feb 19, 2004 at 13:02

Thursday, Feb 19, 2004 at 13:02
Guys most of these cheaper places get the fuel from the same places as mobil and BP. It comes down to the quality of the tanks that a particular station has alot of the time. I do a lot of work for Peak and Gull over here and talk to these guys a fair bit. I used to always stay away from these kinds of places however I have found that going to the sites where they have just replaced the tanks with new fibre glass units I have no problems with Deisel at all. However if I go to a BP that has old rusty tanks I get problems. Sometimes the older servos are better as they have somtimes just received new tanks whereas a site that is only 15 years old and looks quite well looked after might have 15 year old metal tanks that are about to clap out.
AnswerID: 47315

Reply By: Russell [Pajero] - Thursday, Feb 19, 2004 at 17:56

Thursday, Feb 19, 2004 at 17:56
I would have thought that the extreme temperatures we have been sufferring lately might have had a reverse intercooler effect on a diesel?

Earlier posts talked about diesels smoking more in summer!!

RTA

Russell
AnswerID: 47343

Reply By: Ray - Thursday, Feb 19, 2004 at 22:23

Thursday, Feb 19, 2004 at 22:23
How about Rockhampton, we are only paying 65 cents per litre with the woolies voucher or get a Doblo's voucher ( a local competitor) and you get 12 cents a litre off and it's been as low as 62 cents. It's been going on for at least 12 months now. Hope it lasts!!!!!
AnswerID: 47390

Reply By: Nomad - Friday, Feb 20, 2004 at 00:42

Friday, Feb 20, 2004 at 00:42
Geez Ray, almost worth driving to Rockhampton.

I think the nail was hit on he head with the bit about older tanks that have some rust and other crap in them. I buy exclusively from Woolies (Safeways for you Mexicans) and have never had a problem. Our outlet is only a few years old so their tanks would be pretty clean.

However, just think about this. Would someone like Woolies or Coles risk selling second grade diesel to their customers. They couldn't cop the flak. I think you will find that all their diesel is at least equal to all other outlets.

If you have a problem then look at old tanks, dirty tanks or, God forbid, doctored up fuel.
AnswerID: 47410

Reply By: sean - Friday, Feb 20, 2004 at 23:31

Friday, Feb 20, 2004 at 23:31
I live in the NT and for the past 4 years I have always got better economy as soon as I get to Port Augusta. Say 2 litres to one ks better.

I recen times exonomy has got even worst.

I think the grade and quality of fuel does vary. I do know it comes from different markets depending on where u live.

Sean

AnswerID: 47486

Reply By: Sandie - Monday, Feb 23, 2004 at 18:49

Monday, Feb 23, 2004 at 18:49
Have you checked your injector pumps and seals?
You may find a small leak if you get a low sulphur fuel.
This happened to me a about 8 months ago on my 89GQ.
Got the seals replaced and pump re-calibrated (although not done very well) and hey presto, I got better economy.

Just out of curiosity how many Km's do poeple get out of the Nissan GQ 4.2Diesel with a 95L tank?
AnswerID: 47750

Follow Up By: Linga Longa - Tuesday, Feb 24, 2004 at 10:38

Tuesday, Feb 24, 2004 at 10:38
I get about 7.7 kpl round town and and 8.1.kpl on the highway
I have had the injectors done and the pump pressure increased.
0
FollowupID: 309784

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