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Fuel consumption is high

Posted: Tue Apr 27, 2010 10:34 am
by Denis
my 5 door pajero (1991) has clocked 159000km (2.5l diesel). since my last service; i have had a problem of fuel consumption. firstly, my fuel gauge gives me wrong readings. ie i put 10l and the gauge shows half tank. and secondly, for every 5km, it consumes 10l. please help me on how i can deal with this problem.

thank you

Re: Fuel consumption is high

Posted: Tue Apr 27, 2010 1:30 pm
by 4ePikanini
eish!

That equates to 0.5km/liter :shock:

That sounds like a leak or somebody is stealing your diesel at night.

At that rate it should be smoking so bad that it looks like a locomotive

or it is in your oil - check your oil level to see if it has risen. If it has DO NOT drive it. It can run away with you. Have it fixed asap.

Re: Fuel consumption is high

Posted: Tue Apr 27, 2010 4:26 pm
by 4ePajero
Denis,

Never rely on the fuel gauge to even estimate fuel consumption.
The only reliable check is to check the distance travelled between two full tanks.

The consumption you mention is just about impossible, so check it properly and work from there.

Re: Fuel consumption is high

Posted: Wed Apr 28, 2010 9:24 am
by Denis
thanks guys for your replies. how do i get this issue fixed as i have tried a couple of mechanics here and nothing is working. as for the OEM dealer's prices, are way past the ceiling. do you think its to do with the oil, diesel filter or something i dont know about?

Re: Fuel consumption is high

Posted: Wed Apr 28, 2010 12:09 pm
by Cas
Hi Guys

This is my first post here,so HI to everyone.

I own a 09 Paj 3.2 did auto Glx for a week or so,lekker :mrgreen:

Use to petrol,but this baby runs :D

At 140,i got about 10km/l. At 160, 6km/l :o

Is this normal?

tx
cas

Re: Fuel consumption is high

Posted: Wed Apr 28, 2010 12:44 pm
by RoelfleRoux
Cas,
Not normal to run a 2.5ton topheavy beast at 160km/h.

Wind resistance increases exponetially with speed. Wind resistance is the biggest consumer of fuel on any car at speed and more so on a 4x4 that had the aero-design done by Brickor!

Re: Fuel consumption is high

Posted: Thu Apr 29, 2010 12:41 pm
by Cas
Hi Roelf

What kind of consumption do you get at 140?

I'm seriously looking at a Gls,I'm suffering without cruise control :roll:

Petrol bill is not a problem,I use to have a Fort V6 and man.............. you can't compare the drive :mrgreen:

Toyota has fortunately lost me :lol:

Re: Fuel consumption is high

Posted: Wed May 05, 2010 9:04 am
by RoelfleRoux
Sorry Cas, I missed your previous post.

When you start cruising at 120plus, the wind direction and velocity plays a big role. One is not aware of it (enough power and cab insolation), but the consumption can vary from 13 to 16 (l/100km) with-out really noticing any change in speed or condition.

I was under the impression that the GLX had cruise control. But yip, these cars are very seductive and to not have cruise- and climate control does take some of their charm away. Just my very personal angle.

Roelf

Re: Fuel consumption is high

Posted: Wed May 05, 2010 9:27 am
by MR2-Blue
I have a 2004 3.2 DiD SWB with 177.000 km on the clock. When I bought the vehicle in late 2008 it had a roof rack and jerry can holders on it.

The consumption was very high to my personal opinion:
- in the daily traffic huzzle: 14l/100km
- overland: 12l/100km @ 120 km/h
- overland with cruise control: 11l/100km (same speed)

Since I removed the roof rack:
- in the daily traffic: 12l/100km
- overland trips: 11l/100km @ 130+ km/h
- overland w/ cruise control: 10l/100km @ 130 km/h
- less noise from the wind

Even with fully loaded boot at 140 km/h but w/o the RR on the way to Namibia we had not more than 12l/100km consumption.

I believe all the gear on top of the majority of the vehicles here drives the high consumption.

Re: Fuel consumption is high

Posted: Wed May 05, 2010 10:16 am
by SimonB
Nowhere have any of the posters mentioned that he has a roof rack. Everyone acknowledges roofracks are responsible for increased fuel consumption. But all else being equal, increases in fuel consumption are a cause for concern. This guys fuel consumption would need a sail on his roof.