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Reduction in MPG
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rich_959
 


Member Since: 12 Jan 2009
Location: East Yorkshire
Posts: 105

United Kingdom 2014 Discovery 4 3.0 SDV6 XS Auto Aintree GreenDiscovery 4
Reduction in MPG

Hey everyone,

I'm 2 years into D3 ownership now and loving it. Aside from having EGR's blanked last year and a faulty intercooler hose (very helpfully diagnosed by 10forCash and Pete at BAS), the old girl has been running like a dream.

My only niggle is that over the last 6 months it seems to have taken a dive in the MPG department. Before the EGR blanks by Pete, I used to get about 26/27 and afterwards it picked up to around 30mpg on my average tank of fuel - superb! But recently it's slipped back down to around 26. It's due a service next month and I'm just wondering if there's anything else that can be done (besides from having a lighter right foot). It's an auto and I've heard a gearbox flush can help? It's a 54 plate with 60k miles and I assume that's never been done.

Any help/advice/opinions greatly received!

Regards,


Rich.
  
Post #69381717th Sep 2010 8:48 am
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DSL
Keeper of the wheelie bin 


Member Since: 11 May 2006
Location: Off again! :-)
Posts: 73045

Ukraine 

Brakes partly binding can do that, one of mine's in the dealer for that at the mo. Check for one wheel hotter than the others after a run.
   
Post #69382117th Sep 2010 8:56 am
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rich_959
 


Member Since: 12 Jan 2009
Location: East Yorkshire
Posts: 105

United Kingdom 2014 Discovery 4 3.0 SDV6 XS Auto Aintree GreenDiscovery 4

Cheers DSL, I'll check for wheel heat. I did knock it into neutral the other day and let it roll to a stop, just to see if I could feel any resistance in general (other than it's weight!) and it seemed to role pretty smoothly to a stop but I didn't think to check the wheel temps. It will be due some discs and pads soon, so it's a definite possibility.

Cheers,


Rich.
  
Post #69383417th Sep 2010 9:26 am
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Robbie
 


Member Since: 05 Feb 2006
Location: ¯\_(ツ)_/¯
Posts: 17932

United Kingdom 2013 Discovery 4 3.0 SDV6 HSE Auto Baltic BlueDiscovery 4

By the time my service is due my I have lost about ~ 1.3 mpg. With a clean air filter it is back to normal.
  
Post #69398717th Sep 2010 5:06 pm
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DSL
Keeper of the wheelie bin 


Member Since: 11 May 2006
Location: Off again! :-)
Posts: 73045

Ukraine 

Yep air filter is another possible. LR think our air quality is good enough to change every 45k/3yrs. Change mine every year or 15k.
   
Post #69399117th Sep 2010 5:20 pm
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jamieg7762
 


Member Since: 05 Mar 2010
Location: Warwickshire
Posts: 1232

England 2013 Discovery 4 3.0 SDV6 HSE Auto Corris GreyDiscovery 4

I lost 10mpg on Wednesday this week, this picked up on Thursday as I lost 8mpg.

Normally get 30-32mpg on my way too & from work. However on Wednesday I drove the same but only got 21mpg, then on Thursday I got 24mpg.

Took the subaru today as it cost me £70 to do 210miles (2 days of comute) in the Disco, normally £70 will last 3.5 days.

Need a service, am booked in on the 30 sept, may need to fetch it forward. Hopefully that will resolve the issue.
  
Post #69403817th Sep 2010 7:31 pm
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devonchilliman
 


Member Since: 03 Nov 2008
Location: Devon
Posts: 5224

England 

Just had mine serviced last week

and deffinately notice an improvement Mr. Green

Devonchilliman
  
Post #69404117th Sep 2010 7:39 pm
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