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Discussion Starter · #1 ·
Hi just wondering if anyone else suffers with poor fuel consumption. 20181.6 cdi gts line. 12 mile journey to work according to the trip/fuel display shows 36 mpg 9 mile motorway 3 mile normal roads no major traffic and steady driving. Around town getting 25 mpg on a 7 mile trip. Car on 37000
Miles only had it 9 days.
 

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I've no personal experience of the Cdi, but that those numbers do sound low to me. Even my undergeared turbo-petrol will easily achieve those. But, hopefully some owner can offer a more meaningful insight.

While you're waiting, first obvious thing that occurs to me is have you reset the trip computer? The previous owners numbers may affecting your numbers otherwise. Second, it might be it just needs a good run on the motorway at higher revs (so, one gear lower than normal) and perhaps a nice tank of V-Power or 'ordinary' with a reputable injector cleaner in it. There are so many things that can get 'gummed-up' with modern diesels, it may be suffering from the previous owners use. If it shows no sign of improving after that, it may be you need to get it back to the retailer for a check over.
 

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It's about right to be fair, slightly low but nothing crazy... Depends how busy traffic you are taking about. Your never getting the engine fully upto temperature, mpg is much worse in winter.

Drop 5mph off your motorway speed.

Try driving longer journeys...you should get 50/55+ on a steady long run.

Manual or auto box?
 

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Discussion Starter · #4 ·
It's about right to be fair, slightly low but nothing crazy... Depends how busy traffic you are taking about. Your never getting the engine fully upto temperature, mpg is much worse in winter.

Drop 5mph off your motorway speed.

Try driving longer journeys...you should get 50/55+ on a steady long run.

Manual or auto box?
Automatic. I’m already doing 55-60
On motorway. Tried the resetting of the trip also. Its extremely disappointing if thats the real mpg. No where near what they claim when advertising it.
 

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Automatic. I’m already doing 55-60
On motorway. Tried the resetting of the trip also. Its extremely disappointing if thats the real mpg. No where near what they claim when advertising it.
Auto...there is your answer.

Very few cars get anywhere the claimed figures. That's a known thing for all manufacturers. Mine is a manual, Kia claim 72mpg or something ridiculous like that... In reality I get 45-50 in mixed use, 55 on a longer sensible run.
 

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Petrol or diesel ?
If petrol you would be lucky to get better mpg in the winter months with an auto,should improve a little when the weather warms up,worth checking for binding brakes perhaps ?
Assuming car serviced ok with clean air filter etc.
 

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Given Kia's take about 5 miles to get up to temp @ this time of year. Not bad.

That around town on a short trip is the same as I get in Niro HEV. Depending on miles done trip meter can read 20's to 110 MPG.

Best to ignore trip mpg & do tank to tank measurements.
 

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Discussion Starter · #8 ·
Petrol or diesel ?
If petrol you would be lucky to get better mpg in the winter months with an auto,should improve a little when the weather warms up,worth checking for binding brakes perhaps ?
Assuming car serviced ok with clean air filter etc.
I’ have asked the ? To the supplying dealer of it had air and fuel filters done on service 4 year old and 37k so I would of thought they were changed on service but awaiting conformation on that
 

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Stu, I cant tell if you meant to type "GDI" or "CRDI" when typing "cdi". GDI is petrol and CRDI is diesel, I'm sure i don't need to tell you that!

36mpg average and 25mpg town is about par for a petrol engine. Poor for a diesel, I get around 51-52mpg average (all NSL running) and pure town running shows about 42mpg using stop/start although it is annoying in heavy traffic (2015 CRDI "2" hatch)

Check that brakes aren't binding, not running around with a boot full, correct tyre pressures, cant advise further.

I see an auto as well, not great for economy and great for relaxing.
 

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Discussion Starter · #10 ·
Stu, I cant tell if you meant to type "GDI" or "CRDI" when typing "cdi". GDI is petrol and CRDI is diesel, I'm sure i don't need to tell you that!

36mpg average and 25mpg town is about par for a petrol engine. Poor for a diesel, I get around 51-52mpg average (all NSL running) and pure town running shows about 42mpg using stop/start although it is annoying in heavy traffic (2015 CRDI "2" hatch)

Check that brakes aren't binding, not running around with a boot full, correct tyre pressures, cant advise further.

I see an auto as well, not great for economy and great for relaxing.
Yeah it’s the diesel one. Brakes are okay. Eco is t
Working waiting for new battery to be fitted . Cant see it making much difference though
 

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Could the display reading wrong, best thing is to fill to brim (2 clicks) drive 200-300 miles (zero trip and recorded mileage) and then fill again to brim two clicks. Work out litres put in to gallons, then divide the recorded mileage by gallons. I bet you will see a better figure for MPG. I appreciate at the moment this is an expensive way of testing.

The more anal of people will say do it same garage, same pump and ambient temp but for a gauge its ok to fill anywhere.

I get my figures from the display but what I put in each week 9same amount) and what mileage/days it lasts tells me this is ok and to be trusted.
 

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Yeah it’s the diesel one. Brakes are okay. Eco is t
Working waiting for new battery to be fitted . Cant see it making much difference though
It wont make any difference to mpg.

Its about right for auto box, and the conditions you are using it in. Accept it or sell up, I don't see you can do much else. It won't do 50+ mpg from cold and around town.

Try a 200 miles steady drive and you'll see an improvement.
 

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As others have suggested - a longer trip using 'full to full' against mileage run is the best way to calculate mpg,I don't know how cold it is where you live but during the winter months up here in scotland we can easily lose 5mpg on both our 2 vehicles.
You should be getting over 40 mpg I would have thought - but not in winter and not on short runs,diesels warm up slowly.
If it makes you feel any better - our 1.6 petrol vitara auto does 30mpg (winter prob 26) and our Sportage 2.0 crdi auto does 40 mpg on a long run (winter prob 36) - but I never check mpg until spring as I know it is bad between Dec and April (scotland).
I would be checking the air filter myself but I guess not everybody wants to do that,you have to be careful removing air filters in modern cars,if you can even see them LOL,a 'Service Record' is only as good as the person with the stamp.
 

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Could the display reading wrong, best thing is to fill to brim (2 clicks) drive 200-300 miles (zero trip and recorded mileage) and then fill again to brim two clicks. Work out litres put in to gallons, then divide the recorded mileage by gallons. I bet you will see a better figure for MPG. I appreciate at the moment this is an expensive way of testing.
Given the speed of price rises. Filling to brim is best way to save money (y)

@Dubs
The point of checking out tankfulls is that it balances out the peaks & troughs of short & long trips.
 

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Given the speed of price rises. Filling to brim is best way to save money (y)
It looks like everyone in the queue this evening at the supermarket near me had the same thought! On previous performance, it'll be empty again by tomorrow afternoon...
 

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I had a 2017 1.6 diesel Ceed GT Line S with the auto box and I think claimed economy is something insane like 65-70mpg. I did 65k miles in 3 years from brand new, so much of it sat on the motorway doing 150 miles in a go, never saw more than 52mpg. It is by far the worst diesel for economy I had, brilliant car, but not economical compared to other diesels I have had. I tracked every single fill up from day 1 and I average 48mpg through my whole ownership. A third of this was with diesel V Power too so I can't even blame poor fuel. For your low mileage I would say what you are getting is correct. Diesels need big miles to be efficient and 12 miles doesn't cut it.

I have since had a 2019 Proceed petrol automatic for a week as a courtesy car, same routes and I got 55mpg without even trying. Maybe I had a dud engine in the diesel or the petrols have become much more efficient in newer models.

Right now I average 27mpg in the Stinger and this is with lots of motorway to bring that up! 16-20mpg around town. These petrol prices are killing me...
 

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Trouble is I think that 1.6 diesels may tend to struggle a bit/work too hard and also strangled at birth by emissions systems,I still prefer a 2.0/2.2 Ltr diesel as they tend to lope along with plenty of torque.
Most diesels I have had were in the 1.9 litre to 2.2 litre class and mpg was usually somewhere between 45 - 58 mpg.
I only ever had 2 x 1.6 diesel cars - the first did 60mpg but no power/torque (non turbo Escort) and the 2nd was a C3 Picasso which seemed to be working very hard on Mway trips,although a mild remap helped with the available torque - it certainly did not improve fuel consumpion LOL
 

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Discussion Starter · #18 ·
Trouble is I think that 1.6 diesels may tend to struggle a bit/work too hard and also strangled at birth by emissions systems,I still prefer a 2.0/2.2 Ltr diesel as they tend to lope along with plenty of torque.
Most diesels I have had were in the 1.9 litre to 2.2 litre class and mpg was usually somewhere between 45 - 58 mpg.
I only ever had 2 x 1.6 diesel cars - the first did 60mpg but no power/torque (non turbo Escort) and the 2nd was a C3 Picasso which seemed to be working very hard on Mway trips,although a mild remap helped with the available torque - it certainly did not improve fuel consumpion LOL
So it seems I bought a shite car…… after reading online reviews saying how good it was …. Great
 

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Hi Stu
Maybe reserve judgement until you do a longer trip in warm weather - as others have posted - diesels do much better over longer trips,we rarely do a trip of less than 35 miles in our diesel Sportage auto and in warm weather that will usually return at least 38 mpg ish.
On a warm day you probably should get 45 mpg if no problems with car.
We park our cars on a slight slope and my quick check for binding brakes is to see if they 'roll' easily in neutral.
 
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