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Hyundai i30: Diesel fuel consumption

Asked by Mark Pearson, Ballajura, WA.

We replaced our 2004 Toyota Corolla with a Hyundai i30 diesel, even though it cost $4000 more than the petrol model. The decision was made partly because of the fuel savings possible with the diesel based on the stated fuel consumption of 4.6 L/100 km, but the very best we have averaged for country driving is about 6.5 L/100 km, which is similar to our 1.8-litre Corolla. The dealer has told me that the fuel economy is excellent and Hyundai allows for a 50 percent variation from the advertised results. The vehicle is currently being advertised as doing more than 1000 km on a tank of diesel, but we get only 700km on long runs. I can only presume there is either something wrong with our car or they advertise incorrect fuel figures. What do you think?

Answered by CarsGuide

11 Aug 2011

Hyundai claims an average fuel consumption of 4.7 L/100 km for the i30, with 4.1 L/100 km in extra urban driving and 5.7 L/100 km in urban driving. The fuel consumption figure used by Hyundai, and all other carmakers, is derived from the standard test conducted in a test laboratory, not real life. The purpose of publishing the test result is to provide buyers with a means of comparison between makes and models, it's not really meant to be taken as a real life measure of what you would get yourself. But it shouldn't be too far from the mark either, and I would reckon a 50 per cent variation is too much. More to the point you need to take into account your driving conditions, do you drive in flat or hilly conditions, do you have a lot of stop-start traffic on your way to work, do you mainly do short trips. The consumption you get is on the high side, and you could ask the dealer to check your car to make sure it is running well, but I believe the problem will be environmental.

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