Autocar India
BP

Bharggav Paranjape

2d

I was planning to buy the Honda Amaze CVT earlier, but due to uncertainty around a higher percentage of ethanol blending, I have decided to go with the Tata Altroz diesel. But now I read that the government is also planning to blend isobutanol in diesel. Should I buy a diesel vehicle or not? Will isobutanol adversely affect diesel engines and affect fuel economy?

Autocar India team

Autocar India

Verified
28m

There is no reason to avoid either a petrol or a diesel car purely because of future fuel-blending plans.

Just as modern petrol cars are being engineered to handle higher ethanol blends, any future diesel blend regulations will be accompanied by corresponding changes from vehicle manufacturers. If isobutanol blending is introduced, it will be done in a controlled manner, and vehicles sold in the market will be calibrated accordingly. There is currently no evidence to suggest that such blends would cause adverse effects on modern diesel engines when used within the prescribed limits.

The more important question is whether a diesel suits your usage pattern. If your running is high and includes regular highway trips, the Altroz Diesel remains a compelling option. However, if your usage is predominantly urban, the Honda Amaze CVT is still the more sensible choice. It offers a smoother driving experience, lower complexity and none of the DPF-related concerns associated with modern diesel engines.

Tata Altroz

Tata Altroz

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I own a Hyundai Venue Turbo Petrol, which is driven around 4,000 km per year and is occasionally used by my parents. I have been considering to upgrade it, as I am tired of spending money on maintenance. The car has been problematic since its second year of ownership. I am currently considering the Kia Syros HTK (EX) manual and HTK+ (DCT). However, some automobile enthusiasts have advised me against buying a DCT if I am looking for a hassle-free ownership experience, especially since the car will mostly be driven in Delhi’s office-hour traffic and the overall running is quite low. Could you please suggest whether I should opt for the DCT, stick with a manual, or consider a diesel automatic instead? Alternatively, if there are better options within a budget of Rs. 15 lakh, I would be open to considering them. I can also wait if there are any promising new launches expected this year within my budget. I am not interested in an EV at the moment. Thanks in advance.

Autocar India team

Autocar India

Verified
4d

Given your low annual running and predominantly city use in Delhi, a diesel does not make sense. Modern diesels are happiest when regularly driven on longer runs, and with just 4,000km a year, the higher purchase cost and potential emission system issues are difficult to justify.As for DCTs, they have become far more reliable than early examples, but if the priority is a smooth, stress-free ownership experience in heavy urban traffic, a torque-converter automatic is still the safer bet. It is generally smoother at low speeds and better suited to constant stop-start driving.Rather than moving to a Syros DCT, it would be worth considering the Skoda Kylaq automatic or the Mahindra XUV 3XO automatic. Both use torque-converter gearboxes and offer a more relaxed driving experience in city conditions. The Kylaq feels particularly polished to drive, while the 3XO counters with a richer feature list and a more spacious cabin.If you like the Syros, the manual remains a sensible choice given your limited annual usage, but if an automatic is preferred, a torque-converter-equipped rival would be a better fit than a DCT.

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Posted on: 14 Jun 2026