I am planning to buy the 2026 Kia Carens. My usage includes six days of city driving (about 100 km total), one day of highway driving (around 150 km), and a 500-800 km trip once every three months. However, I am confused because the showroom person himself is suggesting buying the petrol version due to DPF concerns. I currently own a 2017 Maruti Ciaz diesel and have driven 2.5 lakh km in 9 years. Should I go for petrol or diesel?

Autocar India

•15h

Your usage is actually very well suited to a diesel engine. You are driving around 250 km a week, including a proper 150 km highway run, along with long 500-800 km trips every few months. This is exactly the kind of usage a BS6 diesel needs. Regular longer drives generate enough heat for the DPF to regenerate naturally, which is the key to avoiding issues.The concern raised by your showroom mentioned is valid, but only in specific cases. DPF problems typically occurs when the car is used only for short city runs or constant crawling traffic without any sustained driving. In such cases, soot builds up because the filter does not get enough heat to clean itself.In fact, even owners point out that diesel cars can throw warnings if they don’t get periodic highway runs for regeneration.Your pattern is the opposite. You are already giving the car exactly what it needs. Daily running plus a weekly highway stretch means the system will take care of itself without you needing to think about it.Now, coming to petrol vs diesel in the Carens. The diesel is clearly the better engine for your usage. This Kia car is more efficient and far more suited to a loaded 7-seater, especially on highways and ghats. Real-world efficiency is also significantly better, which matters over time. The petrol is smoother for pure city use, but it feels underpowered when fully loaded and will be more expensive to run.

Kia Carens

Autocar India

•16h

Your 40–50 km daily running, plus periodic 500 km trips, is ideal for a diesel. These engines need consistent use and occasional highway driving to stay healthy, and you are already doing both. Issues with BS6 diesels usually arise only when the car is used for very short city runs or constant crawling traffic without ever getting a proper stretch.The DPF needs heat to clean itself, which happens during steady driving at moderate speeds or higher RPM. Short trips and low speed driving lead to soot build-up, but your usage naturally allows the system to regenerate. It also makes sense to choose diesel in cars like the Mahindra Scorpio N, XUV700 or Tata Safari, as the petrol versions are not very fuel-efficient.

Mahindra Scorpio N

Tata Safari

Autocar India

•18h

Your usage involves low monthly running, mostly city, and heavy traffic. In this scenario, the Seltos IVT works in your favour. This is smooth, creep-friendly and very easy to drive in stop-go conditions. There are no jerks, no clutch fatigue and very light controls, which makes daily driving stress-free. In real-world use, this engine-gearbox combo is known to be refined and well-tuned for everyday driving rather than outright performance.Now about the “lag” you’ve heard. It’s not exactly lag, it’s typical CVT behaviour. When you accelerate hard, the engine revs rise first and speed builds gradually, which can feel like a delay. But in city driving, where inputs are gentle and speeds are low, this is barely noticeable. This Kia car only feels weak if you expect quick overtakes or sporty response. The upside is that Kia has tuned it well, so the rubber-band effect is limited compared to older CVTs.Compared to alternatives, the turbo petrol DCT version is quicker and more fun, but in Mumbai traffic it can feel jerky and less reliable in long term. The IVT is the safer, smoother and more relaxed choice. Compared to something like a Creta CVT, the experience is very similar, but the Seltos feels a bit more premium inside.

Kia Seltos

Hyundai Creta