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Farmer joe
Member Since: 10 Sep 2020
Location: Dungannon
Posts: 46
  
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2.7 tdv6 auto was always averaging around 27mpg with a shuddering torque converter, got around to changing the torque converter in July past and noticed an improvement and it was averaging 32mpg but lately it’s been getting thirsty again and is now averaging just 25 mpg, anyone now what might be causing this?
I did notice the fbh running after a 20-30 mile trip, also scanned it for codes and is showing fault P0196 engine oil temperature sensor range/performance, could this be causing a drop in mpg? Thanks.
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 5th Nov 2022 8:06 pm |
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Matty 2332
Member Since: 02 Dec 2008
Location: West Yorkshire
Posts: 670
 
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This time of year you will see a drop in MPG due to the FBH running
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| 5th Nov 2022 9:08 pm |
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lynalldiscovery
Member Since: 22 Dec 2009
Location: Maidstone
Posts: 7274
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Oil temp sensor cheap enough, and easy to change, do it with cold engine and no need to drain oil.
Doubt that is the reason for mpg drop, but if left will end up giving you an unstable idle as the temperature drops.
Some people do unplug their fbh in a bid to save fuel, not tried it myself, but fbh on full power is approx 1/2 litre per hour, and if doing local work I can see the fbh running an awful lot, but then the engine will not get to operating temp and not be as efficient!
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| 5th Nov 2022 9:34 pm |
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LT
Member Since: 31 Dec 2005
Location: South West
Posts: 23538
 
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As an aside to the above, I saw a noticeable improvement in mpg by changing the air filter much more frequently than recommended. 2006 D3 HSE (Original & still the best)-GONE
2010 D4 HSE (A bit bling)-GONE
2014 D4 HSE (Almost too bling)-GONE
2015 D4 HSE (A heated what?)-GONE
2016 D4 Landmark (Written Off)-GONE
2016 D4 Landmark (Surely the last!) PD1881 rims-GONE
2017 FFRR SDV8 Autobiography (now semi-retired)
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| 5th Nov 2022 11:36 pm |
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Flatlander
Member Since: 20 Jul 2015
Location: Here
Posts: 575
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Tyre wear & pressures can have an adverse effect upon mpg just as much as having a roof rack fitted, don't discount things like ambient temperature, traffic and fuel quality - as mentioned, airflow can have a unexpectedly high impact as well.
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| 5th Nov 2022 11:55 pm |
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