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I'm planning to buy a new 7-seater manual with a budget of around Rs 18 lakh. My current preference order is: Tata Safari Petrol, Mahindra XUV 7XO, Mahindra Scorpio N, and Kia Carens Clavis. My annual running will be around 12,000km, mostly on highways, but the car may remain parked for 3-6 months at a time. I plan to keep it for at least 7-8 years. My biggest dilemma is petrol vs diesel. Petrol is my first preference because of my relatively low running and the long periods when the car will be parked, but I'm concerned about E20 ethanol-blended fuel. On the other hand, these are large and heavy vehicles, so fuel efficiency is also important. I'm considering diesel for its better mileage, but I'm worried about the long-term reliability of the DPF and DEF systems if the car remains unused for several months. What would you recommend?
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Although your annual running of around 12,000km sits on the fence between petrol and diesel, your usage pattern is predominantly highway, which plays to a diesel's strengths. The concern about DPF is understandable, but it's often overstated. DPF issues are far more common in vehicles used almost exclusively for short city trips. Since your driving is mainly on highways, the system will get the opportunity to regenerate properly. As for the car remaining parked for 3-6 months, that's not ideal for either fuel type. Diesel cars require some precautions, such as keeping the tank full and using fresh DEF when the car is put back into regular use. Still, long periods of inactivity are not a reason to avoid diesel altogether.
We wouldn't let E20 fuel influence your decision either. Modern E20-compliant engines are designed to run on it, and there is no official roadmap beyond E20. While ethanol can marginally reduce fuel efficiency, it is not a reason to avoid buying a petrol car today.
Among your shortlist, we'd place the Mahindra XUV 7XO ahead of the others. It is the most rounded package, offering excellent space, comfort, safety and highway ability.
Mahindra XUV 7XO
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Posted on: 23 Jul 2026
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