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Old 11-12-2010   #1
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Fuel economy

Help,Can anyone suggest a reason for my '05 plate 1.2 Panda to suddenly drop from 52 mpg overall to low to mid 40's?Dave.
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Old 11-12-2010   #2
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Re: Fuel economy

Quote Originally Posted by s2airflow View Post
Help,Can anyone suggest a reason for my '05 plate 1.2 Panda to suddenly drop from 52 mpg overall to low to mid 40's?Dave.
I would say the weather but it should never drop that drastically, have you checked your oil, etc.?
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Old 11-12-2010   #3
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Re: Fuel economy

They do run richer to warmup so the drop is more than likely to do with that. That or it's broken, serviced lately?
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Old 11-12-2010   #4
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Re: Fuel economy

How are your tyre pressures? Mine are low atm.. need to pump them up! But im getting lower than average mpg
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Old 11-12-2010   #5
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Re: Fuel economy

colder weather most certainly - I lost a good 6 mpg with my Panda last winter

Have you also had the engine running while you scrape ?

Have you been driving in different traffic ?


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Old 12-12-2010   #6
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Re: Fuel economy

Snow, slush and traffic!
Just physically pushing through the snow and slush on the roads needs much more work from the engine. The wheels spend an appreciable amount of time slipping, if only slightly. The traffic is much more stop/go.
Then there's the other reason already given of the engine running cold for longer. My Panda, albeit a diesel, sometimes fails to reach its normal operating temperature at all in urban driving in this cold.
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Old 12-12-2010   #7
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Re: Fuel economy

winter weather, dark nights, heater in use,air con for demisting, heated rear screen, lights, wipers...all draw on the battery and consequently hit fuel economy...

as mentioned above, it will run richer for longer while it warms up from cold too...my 1.2 is suffering a similar mpg hit
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Old 12-12-2010   #8
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Re: Fuel economy

Thanks so far guys.It seems I'm not alone with this so I guess I shouldn't worry too much at this stage.I keep a check on consumption with everything as it highlights problems which otherwise could go unnoticed,and its paid off in the past fine style with in particular a 520 B.M.I do all my own servicing so its not sheer neglect,but I was conjuring up problems like the Lambda sensor or the ECU going down etc.With the fuel price hikes in the New Year it needs to be spot on.I suppose too that a smaller engine will show up a drop in efficiency faster than a bigger car/engine.Other than that its a cracking little motor & so far I'd get another one if they are down to 35 tax & not 120 or so.Is there any real advantage in the diesel over the petrol?Dave.
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Old 12-12-2010   #9
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Talking Re: Fuel economy

Providing you are doing the distance then yes a diseasal will be more economic than a petrol.

for short runs though you would be better off with a petrol.


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Old 12-12-2010   #10
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Re: Fuel economy

If there was anything wrong with the engine the warning light would probably come on.

It is most likely a combination of the weather, dark nights and Christmas traffic etc.

Not really noticed an MPG hit on my 1.1 but due to weather I have broken my usual filling up routine so I have no idea how much I have put in I would need to check the receipts.

I had been getting 80 miles for 10 worth of fuel all city driving.
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Old 17-12-2010   #11
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Re: Fuel economy

Quote Originally Posted by s2airflow View Post
Other than that its a cracking little motor & so far I'd get another one if they are down to 35 tax & not 120 or so.Is there any real advantage in the diesel over the petrol?Dave.
On my 1.2 Dynamic Eco, renewal cost 30 last month, a pleasant surprise as I was expecting 35...I think they reduced it in the last budget...that's only the Eco model though remember.
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Old 17-12-2010   #12
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Talking Re: Fuel economy

Bog standard 1.2 will be 110

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Old 20-12-2010   #13
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Re: Fuel economy

Just checked the consumption over the last 2 tanksfull & its 43 mpg (not short runs).I've blanked off 1/2 of the rad.grille hoping to got it to run hotter (temp guage 1/2 way as normal ) but the heater is still only warm so I may cover more of the grille to get a result.
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Old 21-12-2010   #14
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Re: Fuel economy

Quote Originally Posted by s2airflow View Post
Just checked the consumption over the last 2 tanksfull & its 43 mpg (not short runs).I've blanked off 1/2 of the rad.grille hoping to got it to run hotter (temp guage 1/2 way as normal ) but the heater is still only warm so I may cover more of the grille to get a result.
I know friends up in the highlands do blank the whole grill, works for them. I know my vecturd diesel isn't getting hot unless it's thrashed this time of year.
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Old 15-02-2011   #15
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Re: Fuel economy

The consumption has just returned to 52 mpg for our 1.2 Dynamic.No change in use at all BUT it broke down last week.No ign.lights when key turned.Didn't find the actual fault so ran a lead from the internal fuse box to the ignition switch & its O.K.now.(did this fault have anything to do with the economy?)
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