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Poor MPG
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bammmy
 


Member Since: 12 Jan 2013
Location: Manchester
Posts: 138

United Kingdom 2013 Discovery 4 3.0 SDV6 XS Auto Santorini BlackDiscovery 4
Adding 2 stroke oil to SDV6

Hi,
I have a 2013 3L sdv6 Discovery, having done 34k.
Over the last couple of months have noticed a drop in fuel economy.
As I have a trip to Scotland arranged for early February, doing around 1000 miles, thought I would have a look at rectifying this.
Options I have been told are-
That’s normal because of the fuel burning heater.
Have a course of Revive turbo cleaner.
Clean the two air sensors next to the air filter.
Change fuel to premium.
Change air filter.

Or lastly add 500ml of semi synthetic 2 stroke oil into the fuel tank.

As you can see so much advice given.

Any thoughts from the Landrover world appreciated.

Cheers.
Mark
  
Post #18962221st Jan 2018 2:46 pm
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Gareth
Site Moderator 


Member Since: 07 Dec 2004
Location: Bramhall
Posts: 26682

United Kingdom 

This post has been edited by the site administration team

Post split from 2so thread at op request.
  
Post #18968923rd Jan 2018 8:16 am
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Sheepy
 


Member Since: 20 Feb 2013
Location: Bedfordshire
Posts: 630

United Kingdom 2010 Discovery 4 3.0 TDV6 GS Auto Zermatt SilverDiscovery 4

Check each wheel hub after a long run and make sure one isn't hotter than the others. A sticking calliper will degrade your MPG quite a bit (even if only a slight stickiness)!
  
Post #18968933rd Jan 2018 8:18 am
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david007
 


Member Since: 01 Sep 2012
Location: Angus
Posts: 15

United Kingdom 

What mpg are you currently getting? type of journey, long, short, motorway back road etc.?
  
Post #18969073rd Jan 2018 9:26 am
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NJSS
 


Member Since: 06 May 2009
Location: Catherington, Hampshire.
Posts: 10463

United Kingdom 2016 Discovery 4 3.0 SDV6 Landmark LE Auto Waitomo GreyDiscovery 4

Are you towing; if so what?

Do you have a roof rack?

My consumption over the last 7,691 miles is 317.27 litres of Shell diesel = 24.2 MPG

That's driven hard in all conditions, 5% off-road, using lots of anticipation, & little use of the brakes.

NJSS
 Am I Gammon or Woke ? - I neither know nor care.

2016 Discovery 4 Landmark
2011 Mercedes Benz SL350 (R230)
1973 MG B GT V8 - 3.9L John Eales engine, 5 speed R380 gearbox, since 1975.
1959 MGA roadster - 1.9L Peter Burgess Engine - 5 speed gearbox
Past LRs - Multiple FFRs, Discos & a Series I - some petrol, some diesel,
none Electric or H2 fuel cell - yet.
There are 10 types of people in this world: Those who understand binary, and those who don’t. 
 
Post #18969093rd Jan 2018 9:29 am
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DavidSally
 


Member Since: 31 Oct 2012
Location: Chesterfield
Posts: 565

United Kingdom 2008 Discovery 3 TDV6 HSE Auto Tangiers OrangeDiscovery 3

If it’s only over the last couple of months as you say it could just be down to the cold weather....
  
Post #18969113rd Jan 2018 9:39 am
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Iguana
 


Member Since: 14 Oct 2013
Location: 'Sunny' Zomerset
Posts: 9402

Ukraine 

Tyre pressure also, if too low then will impact MPG
 Iggy/Ieuan

Current LR =
2015 RR Sport Autobiography
&
1992 Land Rover Defender Camper

- Gone but not forgotten:
MY10 D4 GS
MY05 Disco 3 'S'
MY14 FL2 HSE manual in Blue
MY15 Disco 4 HSE Lux in Santorini Black
MY08 Disco 3 SE manual in Buck Blue
1960 Series 2 88" (No idea why I sold it!) 
 
Post #18969133rd Jan 2018 9:41 am
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Disco dazboy
 


Member Since: 02 Dec 2013
Location: Leicestershire
Posts: 1782

United Kingdom 2008 Discovery 3 TDV6 XS Auto Stornoway GreyDiscovery 3

How many mpg has it dropped?
 D3 x2 now gone
Volkswagen Tiguan Allspace 4motion 
 
Post #18969163rd Jan 2018 9:48 am
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Mogwyth
 


Member Since: 03 Oct 2014
Location: Pwllheli
Posts: 3976

Wales 2005 Discovery 3 4.4 V8 HSE Auto Zambezi SilverDiscovery 3

As I replied originally fuel formula is changed for winter, from mid Nov to Mid March it is modified to stop waxing down to - 15, this results in less fuel economy to a varying degree depending on engine and fuel map.

What's you before and after figure that gives you concern?
 ==================================
05 D3 HSE V8 4.4
04 MG TF 135
03 MG TF 115 Cool Blue Edition
02 MG TF 160
00 Hymer B564 Lionheart
1971 Series III 109
 
 
Post #18969193rd Jan 2018 9:54 am
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bammmy
 


Member Since: 12 Jan 2013
Location: Manchester
Posts: 138

United Kingdom 2013 Discovery 4 3.0 SDV6 XS Auto Santorini BlackDiscovery 4

Hi all, thanks for comments so far.
I’m back in work tomorrow and have access to thermal image camera so will check then.
I do not do any towing or have a roof box.
Most of my journeys are motorway and A road with just a little bit of town driving.
My consumption on the lie - o meter on a good run used to read around 33/34 it’s droppedto around 29 ish a drop of 10% ish.
As said earlier , I’m going to Scotland early February so was wondering if any of the solutions mentioned might help.

Cheers for thoughts so far.

Mark
  
Post #18969213rd Jan 2018 9:57 am
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DSL
Keeper of the wheelie bin 


Member Since: 11 May 2006
Location: Off again! :-)
Posts: 72740

Ukraine 

10% is kind of normal mpg drop for winter. Thumbs Up
   
Post #18969253rd Jan 2018 10:11 am
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Grianaig
 


Member Since: 08 Jul 2014
Location: Tyne and Wear
Posts: 1286

Scotland 2014 Discovery 4 3.0 SDV6 XS Auto Indus SilverDiscovery 4

What he said. Thumbs Up
 2014 MY Discovery XS Indus Silver. Sadly gone. Second last LR of forty eight years continuous ownership.  
Post #18969293rd Jan 2018 10:14 am
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Mogwyth
 


Member Since: 03 Oct 2014
Location: Pwllheli
Posts: 3976

Wales 2005 Discovery 3 4.4 V8 HSE Auto Zambezi SilverDiscovery 3

Anything up to 20% can be classed as normal winter drop depending on your vehicle and type of journey.

If it's dropped but now consistent then don't don't think you have anything to worry about and not much you can do but the usual tyres pressures, avoid short journeys etc
 ==================================
05 D3 HSE V8 4.4
04 MG TF 135
03 MG TF 115 Cool Blue Edition
02 MG TF 160
00 Hymer B564 Lionheart
1971 Series III 109
 
 
Post #18969333rd Jan 2018 10:25 am
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Hardware
 


Member Since: 28 Jun 2016
Location: Hiding under the M60
Posts: 12676

United Kingdom 2011 Discovery 4 3.0 SDV6 XS Auto Sumatra BlackDiscovery 4

I only dream of 29 mpg !!! (average speed of 14mph over last 3 fill-ups probably explains that)

in theory ... colder input air would give better mpg but it's totally wiped out by warm-up time, winter fuel, and extra loads from heated rear window/seats, lights etc.
  
Post #18969583rd Jan 2018 11:44 am
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DSL
Keeper of the wheelie bin 


Member Since: 11 May 2006
Location: Off again! :-)
Posts: 72740

Ukraine 

This shows how my mpg on the D3 varied over 11 and a bit years. Highs in the summer, lows in the winters. Thumbs Up

Click image to enlarge
   
Post #18969663rd Jan 2018 12:14 pm
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