Poor MPG

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Tom B
Posts: 87
Joined: Wed Dec 12, 2012 2:21 pm

Poor MPG

Post by Tom B » Mon Mar 02, 2015 8:12 am

Hi Guys,I've had my Juke almost 3 years now. its a 2011 1.5 DCI. I use to get reasonable MPG of around 50 when i did 50 miles per day commute. Im now only commuting 16 miles per day, and my MPG has dropped to 35-38ish, Which i dont think is too good for a Diesel, i may as well have a sporty petrol guzzler!Is there anything I can do to improve this?It may even be my driving style! - Should i be driving in a lower gear on Turbo, or highest gear possible at 1.5k RPM?Any advice?
Diesel Weasel


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Lukeplayer187
Posts: 283
Joined: Thu Oct 02, 2014 6:28 pm

Poor MPG

Post by Lukeplayer187 » Mon Mar 02, 2015 8:25 am

With a diesel it's a funny one getting the best out of your engine. Your best off staying in low gears around town and keeping the revs up a bit. You don't want the engine struggling and you don't want to be thrashing the engine either so you need a happy medium. Try changing gears when your up/down shift light tells you too, if the 2011 models has the shift light?. And as you aren't doing so many miles now your not on a long run so your engine isn't getting to an optimum temperature where it needs to be to be efficient. Have you had it serviced recently and is the air filter clean? All these can make for a less efficient car too
Ink Blue... you know it makes sense!!!


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actd
Posts: 2258
Joined: Wed Aug 01, 2012 11:18 am

Poor MPG

Post by actd » Mon Mar 02, 2015 12:58 pm

No shift light on the 2011 model. That sounds similar to the fuel consumption I was getting from my dCi on a 16 miles each way trip - it depends on the roads you are using. If it's like my journey, there is very little steady throttle time, and most of mine was acceleration/deceleration, plus as Luke says, it takes a while for a diesel to warm up, so if you are only doing 8 miles each way, as significant proportion of your journey is warming the engine up. If it's any consolation, for the same journey/driving style (allowing for engine differences), my 1.2 will return below 30mpg.I would give your car a regular (weekly possibly) blast of 20 minutes at least with the engine at 2500rpm, otherwise you might find yourself with a very expensive DPF repair at the mileage you are now doing.
2012 - Acenta Premium dCI - Gun metallic
2014 - Acenta Premium 1.2 DiG-T - Nightshade
2015 - Acenta Premium 1.6 DiG-T - Black
2017 - N-Connecta 1.6 DiG-T - Black


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Lukeplayer187
Posts: 283
Joined: Thu Oct 02, 2014 6:28 pm

Poor MPG

Post by Lukeplayer187 » Mon Mar 02, 2015 1:09 pm

That is a very good point about the DPF actd.. Which could also be the problem with low MPG maybe? If it's clogged up that won't help so you do need to clear it out. I take my 1.5DCI once a month down the motorway with revs at 2.500 or above for 30 mins as I'm not really doing the mileage in my car anymore.
Ink Blue... you know it makes sense!!!


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actd
Posts: 2258
Joined: Wed Aug 01, 2012 11:18 am

Poor MPG

Post by actd » Mon Mar 02, 2015 1:14 pm

I might be a little more 'sensitive' to DPF problems than most, having suffered a failure
2012 - Acenta Premium dCI - Gun metallic
2014 - Acenta Premium 1.2 DiG-T - Nightshade
2015 - Acenta Premium 1.6 DiG-T - Black
2017 - N-Connecta 1.6 DiG-T - Black


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Lukeplayer187
Posts: 283
Joined: Thu Oct 02, 2014 6:28 pm

Poor MPG

Post by Lukeplayer187 » Mon Mar 02, 2015 1:17 pm

I know which led to to do the once a month run to clear mine having read the threads! I can't believe the price they were charging you for the DPF either!!!
Ink Blue... you know it makes sense!!!


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actd
Posts: 2258
Joined: Wed Aug 01, 2012 11:18 am

Poor MPG

Post by actd » Mon Mar 02, 2015 1:23 pm

That was cheap - if you are out of warranty and the dealer isn't doing you a favour, I think that repair could have been £1000 - £1500 quite easily.
2012 - Acenta Premium dCI - Gun metallic
2014 - Acenta Premium 1.2 DiG-T - Nightshade
2015 - Acenta Premium 1.6 DiG-T - Black
2017 - N-Connecta 1.6 DiG-T - Black


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Lukeplayer187
Posts: 283
Joined: Thu Oct 02, 2014 6:28 pm

Poor MPG

Post by Lukeplayer187 » Mon Mar 02, 2015 1:26 pm

I know they done it as a good will gesture and Evan at £500 it was expensive but sod paying full price for one!!!
Ink Blue... you know it makes sense!!!


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Tom B
Posts: 87
Joined: Wed Dec 12, 2012 2:21 pm

Poor MPG

Post by Tom B » Mon Mar 02, 2015 5:05 pm

Bloody Hell! I dont want to be forking out that much!Have any of you used additives to clear your engine? Redex and the like?Yeah if your only getting 30mpg out your 1.2 im not too bothered now! haha!
Diesel Weasel


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Lukeplayer187
Posts: 283
Joined: Thu Oct 02, 2014 6:28 pm

Poor MPG

Post by Lukeplayer187 » Mon Mar 02, 2015 5:43 pm

Engine additives have been proven a few times that they don't do much. I have heard Catclean is good from euro car parts but even then I don't see the point in them. Your better off warming your car up one evening and going for a 30 min blast down motorways or a nice drive for an hour or so around country roads just to clear the DPF.Lukeplayer1872015-03-02 17:44:42
Ink Blue... you know it makes sense!!!


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