[trev012]

Had the car now for 9 months (Although bought at 6 months old) and feel it is running in nicely. Very smooth and just had it's first service last month at 11k.  Just back from a short week holiday where I took a couple of photos to show that, if you drive conservatively, you can get great MPG. In fairness, the journey to and from our destination had average speed cameras for the best part of 60 miles so wasn't able to go over 60mph.  Considering this is the 1.6 petrol engine, I think it has returned great results ...........

[Shambles]

That's quite astonishing. Well done with the right foot 



(PS, your joy is probably better shown off in the "petrol economy" section...  )

[AlanHo]

My 1.6 CRDi i30 only just about gets that result - no matter how carefully I drive.

Have you checked your actual fuel economy using several brim to brim calculations to compare with the computer. On a previous car I owned (an Audi A4 2.0 litre petrol) - the computer was displaying optimistic economy figures by as much a 5 mpg and the dealership reprogrammed the computer to correct the error at the first service.

You are doing better than the combined mpg in the hyundai brochure which is obtained in a lab under ideal conditions. Unless you have had your car tuned for economy at the expense of performance by a third party specialist - I imagine that Hyundai would be interested in checking the engine mapping on your car so that they can replicate it on standard production vehicles. 

[asathorny]

Hi Trev...

Now then Trev I don't wanna rain on your parade, and well done for being fuel conscious, speed cameras or not.

I can achieve similar MPG to yours with my 1.6 petrol edition manual and the way I do it is to wait till I get to the motorway then press to reset the MPG monitor.  After a few minutes it gives me crazy readings like 90MPG then drops to maybe 50mpg and gradually drops further, BUT, with careful use of the loud peddle I can old it at similar MPG to that which you show us here.

However, only this very day, I was working a hundred or so miles from home and when I got to the motorway I did 'NOT' reset the MPG button but rather allowed it to find it's own level and I averaged out at 38.3MPG.

This later number is one I am more inclined to accept as realistic for a car of over one and a half liters. 

Glad your enjoying your car keep enjoying it, good luck

Asa

[bumpkin]

Frugal use of the right foot will allow the 1.6 petrol to get above 40mpg according to the gauge, I too managed figures like Trev, but only with driving very carefully over a two hour period on the open road, as asa states combined mpg usually evens out at 38 or so.

The ix20 has further readouts compared to the i30, I can flick between Trip A, Trip B, Miles left to refill, Total Average Consumption, Tank average consumption (resets when fuel filler opened) and Point in Time Consumption which is probably the most interesting, acceleration drops to about 12mpg , uphill about 30mpg, flat road ~60mph gives about 65-70mpg and downhill with no pedal pressure or approaching junctions the gauge flatlines at 99.9mpg.

[neoto]

I managed to get 42 MPG on my previous Ford Focus 1.6 petrol without any problems. It all depends on the driving conditions and the road. Therefore, I believe that these figures are not exagerated.
Anyway, on my last trip to USA, I rented a Prius and did almost 2000 miles with it, in the end totaling 55 MPGs with the 1.8 petrol engine!

[asathorny]

Neoto....

No one has accused anyone of exaggeration. 

My comments stated that I too can get similar MPG, with the correct combination of events.  What I, personally, want to know for the sake of my meager purse, is the combined fuel consumption so that I might budget properly. 

If I get on a downhill grade which goes on for a few miles then I get limitless MPG, just knock it out of cog, or indeed leave it in cog and let the ecu shut  off the fuel supply.

When it's all said and done tho, I won't be saying to my client..  "Don't worry about the invoice sir, my car gets unlimited mileage, so have this one on me"   

I'll be saying 'I drive a 1.6 small family saloon which gets AROUND 38 to the gallon, so, here's the invoice for my traveling expenses'  I know, I know, it's all very sad.  But, I have to live in the real world.

[trev012]

Hi All,

Many thanks for all follow up comments from fellow members. To answer a few points noted .....

The car is a bog standard 1.6 petrol and has not been tuned or modified at all. It was just simply keeping a very light right foot for the best part of 110 miles each way and getting into 5th gear as soon as possible.  I feel the gearing on the car is superb and can even drive in 5th gear at very low speeds. This is the real world after all and with petrol costing over £6 a gallon now, motoring is becoming very expensive.

Not surprisingly, when I came home and started town driving, the consumption dropped to average about 43mpg. However, when I do my calculations [as below] the figure is actually approx 7% less than what the computer states so the real figure is 39MPG. I raised this with my service manager at the 1st service but was told there was nothing they could do to fix it 

Which brings me to the next point, raised by AlanHo. Every time I fill her up, I reset the trip. I always take a correct distance milage reading and fill it to the brim with one 'click off'.  I then take a note of the number of litres used and divide this by 4.54 to give me the number of gallons used. I then divide the number of gallons consumed into the actual mileage covered and this gives me a more accurate MPG figure. Since I've owned the car, I started a spreadsheet with every fill up and am pleased to say in 9 months it has averaged 39.65 MPG and that's over 6000 miles of mixed driving. Not bad at all considering with the cold, snowy winter we had in December it was sometimes only managing 32 MPG.

I think I have expressed my frustration before here and elsewhere that it is impossible to reach the figures manufactures state and feel they are very misleading when buying a car. I don't just mean Hyundai as I believe ALL cars are sold on the same basis. It is just so annoying that when you pick up a car magazine and it tells you to expect ??MPG nobody seems to achieve it. I have seen other readers of Auto Express and What Car write in to the letters page complaining of the same.

Now, if only I'd bought the diesel model 

[AlanHo]

Thanks for that info trev012 - it is good to see that like me, you keep a spreadsheet of your fuel consumption. Your car is certainly closer to the "official" consumption figures than I am able to get with mine.

There is one other matter for you to consider - the fact that the car odometer may not be accurate. I have discovered that my odometer is 3.1% in error.

See this thread - https://www.i30ownersclub.com/forum/index.php?topic=9323.0

It so happens that in my case the odometer error was in my favour - but it could equally have been the other way.

You may want to check your's the next time you do a long motorway journey where there are kilometer posts.

[rustynutz]

You may want to check your's the next time you do a long motorway journey where there are kilometer posts.

Who's to say these "posts" are accurate? 

[trev012]

Thanks to AlanHo for info in thread https://www.i30ownersclub.com/forum/index.php?topic=9323.0

I found it interesting that yours is a diesel but are only getting approx 10MPG more than my petrol [49mpg against 39MPG].

Although 49 is good, the book says it should be 62 and is probably not worth the extra outlay at purchase.

[asathorny]

<<<<I think I have expressed my frustration before here and elsewhere that it is impossible to reach the figures manufactures state and feel they are very misleading when buying a car. I don't just mean Hyundai as I believe ALL cars are sold on the same basis. It is just so annoying that when you pick up a car magazine and it tells you to expect ??MPG nobody seems to achieve it>>>>

I totally agree trev 

[Gibber]

Hi Trev,

What tyre pressure do you usually run?

Sent from my HTC Desire

[trev012]

I've got my tyre pressures at 32psi all round, only because this is the figure quoted in the manual and on the door stop. I am slightly bewildered that some people are reporting they have theirs set at 36 & 38psi as I would have thought the rubber would have worn out prematurely at this pressure.

[rustynutz]

I've got my tyre pressures at 32psi all round, only because this is the figure quoted in the manual and on the door stop. I am slightly bewildered that some people are reporting they have theirs set at 36 & 38psi as I would have thought the rubber would have worn out prematurely at this pressure.

32psi may be fine if you do all your driving around town but if, like me, most of your driving is out on the highway or you do a lot of fairly spirited cornering then I'd definately bump the pressure up.
I run at least 38psi and find the handling improved and am quite happy to put up with the slightly harsher ride. I'm sure the extra pressure contributes to slightly better fuel consumption too.
I've noticed no abnormal wear in 22,000k either..... 

[Surferdude]

Trev, running at 36 or 38 won't cause any undue wear. Running at 45 or so will.

At 38, there will be negligible difference to the ride but the sidewalls will be slightly stiffer, helping to keep the tread flatter on the road, even during turns.

When the car is brand new, a very perceptive person might notice a slight improvement in the ride at the 32 psi but as the suspension beds in and settles into its natural position, I defy the average driver to notice a difference.

The tread pattern and tyre construction, as well as the profile (lower is noisier and more harsh) will have more effect.

At the other end of the scale, running down around 25 or lower will contribute to excessive shoulder wear especially on the outside shoulders of the front tyres.

Suferdude (also a "Trev")

[AlanHo]

Another possible consequence, is slight change in the rolling radius.

A few weeks ago - with tyres at 36 psi, I checked the accuracy of my odometer by comparing it over many miles with motorway distance interval boards. I found that it was 3.1% in error - the car was actually doing more miles than being registered on the odometer which of course impacted on my brim to brim consumption calcualtions.

I am currently away on holiday and repeated the odometer comparison over a distance of 72 miles driving uptoour holiday destination. This time the error was found to be 2.7%. I checked my tyre pressures and they are now at 34 psi which leads me to conclude that this accounts for the difference.

[Dazzler]

Thanks Trev...

and very interesting observation Alan 

[trev012]

Sorry, this might seem a silly question, but .............
If everyone is pumping up their pressures to 34psi+, then why do the manufacturers advise they should be at 32psi in the first place?

C'mon all you techies 

[Shambles]

They want the best of all worlds for us trev. I just want stability at motorway speeds, so I now use 38psi

[Dazzler]

Sorry, this might seem a silly question, but .............
If everyone is pumping up their pressures to 34psi+, then why do the manufacturers advise they should be at 32psi in the first place?

C'mon all you techies 

It makes for a slightly better test drive experience which is normally slower around the city stuff...

By the time you buy the car and take it for a good country fang it is a bit late to decide the ride is nice but the handling is $hit (not talking about the i30 or my Hybrid though)