Excessive fuel usage? puzzled, need opinions :s - Hyundai Forums : Hyundai Forum
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post #1 of 15 (permalink) Old 05-23-2019, 10:24 AM Thread Starter
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Question Excessive fuel usage? puzzled, need opinions :s

Hi guys, I recently bought a 2003 getz 1.5L in hopes to own a car thats fuel efficient all to find out that its guzzling a whooping 360km for 31L after changing the spark plugs as well as injectors, cleaning the fuel rail as well as the throttle body and vaccuming the air filter, is the only hope of getting better fuel economy out of this car putting a 1.6L in it? I've got no check engine lights and seems to be running perfectly acceleration wise through the entire rev range, the spark plug in the first cylinder had a strange white coating on the top and I wasn't sure what the cause of it could have been, could this be related to it?
Pic of cyl 1 and cyl 3 posted for reference:


Any help would be much appreciated!

Also is the 1.6 a direct swap just need engine and ecu or possibly just the engine?
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Last edited by eryklok; 05-23-2019 at 10:38 AM.
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post #2 of 15 (permalink) Old 05-23-2019, 10:54 AM
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I would suggest you do a compression test on the cylinders. Use a good OBD scanner and look if the ST and LT fuel trims are in the normal range or if there are any pending codes stored.

You should also update your profile to show the exact model of your car, the mileage on it and your location.


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post #3 of 15 (permalink) Old 05-23-2019, 11:07 AM Thread Starter
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Thanks for the tip, haven't got a compression tester but the car seems to be running perfect, just ordered an obd2 scanner off ebay (one of the cheap bluetooth ones to use with the torque app)
This is purely a delivery/daily car and I have another project in progress but I am trying to figure out whether I am way above norm. fuel wise as I heard these are meant to be very efficient (esp. the 1.6L), but I am trying to keep costs to bare minimum, changing the fuel filter and fuel sender unit already, have to find a second hand reverse light switch, had to change both axles and front breaks on it also, all speakers, a/c is buggered, basically if I can keep this running efficiently for minimal cost in the meanwhile would be good so I am hoping its something simple someone could point me to.
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post #4 of 15 (permalink) Old 05-23-2019, 03:19 PM
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Your fuel consumption equates to 11.6L per 100km, that is indeed really bad when my Google search showed that a Hyundai Getz average fuel consumption in combined cycle for petrol engine is from 5.5 to 7 litres per 100km.

When I looked on the website fuelly.com for 2003 Getz model cars and looked at the entire histogram of the fuel consumption, yours would be by far the worst.

Good luck in finding a solution, 210k km on a 4 cylinder engine is getting pretty high, especially if prior owners did not service it correctly. Can you borrow a compression tester from an auto parts store there in Australia? In the States, most of our auto parts stores have tool lender programs for borrowing tools such as that.
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post #5 of 15 (permalink) Old 05-23-2019, 05:39 PM
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Originally Posted by bdahl385 View Post
Your fuel consumption equates to 11.6L per 100km, that is indeed really bad
Yes, that would be really bad but you've miscalculated.

31Liters of fuel divided by 360km = 0.086L/km
And 0.086L/km multiplied by 100 = 8.6L/100km, so his consumption is no where near as bad as your making out.
And 8.6L/100km calculates to approx 32MPG (that's UK Gallons) which sounds perfectly plausible to me, unless maybe all his driving is cruising on the motorway.
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post #6 of 15 (permalink) Old 05-23-2019, 08:53 PM
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Quote:
Originally Posted by AUTOSPARK View Post
Yes, that would be really bad but you've miscalculated.

31Liters of fuel divided by 360km = 0.086L/km
And 0.086L/km multiplied by 100 = 8.6L/100km, so his consumption is no where near as bad as your making out.
And 8.6L/100km calculates to approx 32MPG (that's UK Gallons) which sounds perfectly plausible to me, unless maybe all his driving is cruising on the motorway.

Thanks AUTOSPARK, yeah I really hosed that conversion up when looking at his 360km vs the 31L of fuel used.

I just converted the L to US gallons and km to miles now to see what the mpg would be in American lingo. I got 27.35 mpg. For a small 1.5L engine that sounds pretty low but since he said it was for delivery it probably is city driving and lot of start/stop cycles. I would think that would be acceptable in those conditions.

https://www.thecalculatorsite.com/co...onsumption.php


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post #7 of 15 (permalink) Old 05-24-2019, 04:19 AM
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Thanks AUTOSPARK, yeah I really hosed that conversion up
Yeah, working with liters will be a bit confusing for you guys in the US who measure your fuel in gallons. We're a bit odd here in the UK because we buy fuel at the pump by the liter but we measure our consumption in gallons. Maybe we'll go back to buying it by the gallon if we ever manage break away from the EU.

To answer the OP's question, no, I don't think you will see any improvement by changing to a 1.6 engine. The 1.6 is the exact same engine only each piston has a slightly longer stroke, so I don't see where the improvement comes from. If you want any significant improvement you'd need to drop the 1.5 diesel engine in there. I've driven Getz with every engine that was available and the diesel was the best, IMO. In fact I liked the diesel Getz so much I bought the company....errr, I mean I bought a diesel Getz.

Sorry, I turned into Victor Kiam there for a second
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post #8 of 15 (permalink) Old 05-24-2019, 10:41 AM
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At that age it's worth changing the thermostat.

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post #9 of 15 (permalink) Old 05-25-2019, 12:34 AM Thread Starter
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Originally Posted by bdahl385 View Post
Can you borrow a compression tester from an auto parts store there in Australia? In the States, most of our auto parts stores have tool lender programs for borrowing tools such as that.
As far as I know they don't let you borrow any tools here :/


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Originally Posted by AUTOSPARK View Post
To answer the OP's question, no, I don't think you will see any improvement by changing to a 1.6 engine. The 1.6 is the exact same engine only each piston has a slightly longer stroke, so I don't see where the improvement comes from. If you want any significant improvement you'd need to drop the 1.5 diesel engine in there.
Oh okay, I just assumed it was based on looking at the l/100km charts on one of the comparison websites the 1.6 seems to have way better results, I'm 99% sure we don't have the 1.5L diesel here in AU, however I am considering just looking for a cheap 1.6L in the next 20.000kms as the engine is high in KM's and almost due for a timing belt which will most likely cost 1/3 of a 1.6L, if all I need is the engine and ECU it might be a worthwhile swap rather than investing in oxygen sensors etc. also.


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At that age it's worth changing the thermostat.
Would there be any benefit to this at the moment? My temps seem perfectly fine with no fluctuations


Also any Factory Service Manuals? I found a topic on here somewhere but all links are expired :/


Thanks for the replies guys

Last edited by eryklok; 05-25-2019 at 01:11 AM.
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post #10 of 15 (permalink) Old 05-25-2019, 07:29 PM
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My temps seem perfectly fine with no fluctuations
By OBD data or by the dash gauge?
I change thermostats every other coolant change (so 6-10 years) as preventive maintenance.

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