Why is the Kia K5's fuel consumption high?

2 Answers
PeterDella
07/28/25 6:33pm
Reasons for high fuel consumption in the Kia K5 are as follows: Vehicle-related reasons: Increased fuel consumption may be due to carbon buildup in the engine, possibly because the owner did not clean the carbon deposits in time, or the oxygen sensor is damaged. A damaged oxygen sensor won't have a significant impact in the short term, but over time it can lead to carbon buildup, clogged catalytic converter, engine noise, and increased fuel consumption. Another possibility is that the car's three filters (air, oil, and fuel) have not been replaced for a long time, resulting in higher fuel consumption. Driving habits: The driver's habits are also one of the major factors affecting fuel consumption. Rapid acceleration or deceleration, prolonged idling, or frequent engine starts can all increase fuel consumption. External factors: Excessive weight from passengers or cargo can lead to higher fuel consumption. Aggressive driving or using the air conditioning while driving can also increase fuel consumption.
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LeLeonardo
08/12/25 12:08am
I've been driving for twenty years, and when it comes to high fuel consumption, the most common issue is driving habits, such as frequently stomping on the accelerator or slamming on the brakes, which forces the engine to burn more fuel. Additionally, the car itself—like a Kia K5—if the air filter hasn't been replaced for too long and is clogged, or if the tire pressure is too low, increasing rolling resistance, fuel consumption will naturally rise. Heavy traffic in the city or carrying too much luggage can also drive up fuel consumption. I think the simplest solution is to first check your tire pressure and maintain it at the proper level, then try to accelerate smoothly and avoid aggressive driving. Regular maintenance at the shop, checking the oil and filters, will likely solve most issues. Developing good habits is key—it can save a lot on fuel costs, which is far more effective than just complaining.
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