Question about Kia Optima

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Dear Sir My wife just bought a Kia Canival 2004 model (auto). The petrol consumption level is a lot higher than expected. It is around 16 litre/100 km even if 30% of the journey was made on highway (tested over 2 weeks). Testing method used: Fill up the tank and reset the trip meter. Then the next time, fill up to the tank again, and record the amount of petrol filled and the km on the trip metre. The readings are: 1st round: 227.5 km, consuming 36.52 litre, consumption level 16.1 litres/100 km. 2nd round: 257.7 km, consuming 40.68 litres, consumption level 15.8 litres/100 km (90 km on highway). Kia's reported petrol consumption levels for this model are: 11 litre/100km in urban environment, and 8-9litres/100km on highway. Would appreciate your kind assistance on what could have gone wrong. Many thanks Jian-xin Zhao PS: The tyres are nearly new, and the air pressure is normal.

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Change the plugs and the air filter &try not to speed, that always consomes more fuel. if that dont help, change the plug wires

Posted on Mar 24, 2011


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