Latest questions

    Asked by: Nimish S For daily city driving of 80-100 km within Mumbai, will the Tata Sierra diesel auto be a better choice? I have heard that DPF causes regeneration issues if the new diesel cars are not driven on long highway trips in their highest gear. The car will be mainly driven in Mumbai traffic and will take around 1,000 km outstation trips once every 4-5 months. Please explain whether a diesel auto, a good combination for convenience and mileage, can be troublesome (DPF troubles) in city use. Thank you. If your daily round covers 80 to 100km, the Tata Sierra diesel automatic is the one that fits your brief best. The diesel’s far more efficient than the petrol for that sort of running, and Tata’s six-speed Aisin torque-converter auto is a well-matched companion for the 1.5-litre engine. It keeps the motor in its sweet spot without feeling strained, whether you’re crawling through traffic or cruising along the coastal road.There’s often a bit of anxiety around diesels and their particulate filters, but that’s largely a non-issue in your case. The DPF’s job is to trap soot from the exhaust and burn it off once the system gets hot enough — something that happens naturally when the engine is under load for a reasonable duration. Problems usually arise only when the car is constantly driven short distances and quits before it can complete this self-cleaning process.Since your daily commute is fairly long, the exhaust will reach optimum temperature often enough for regeneration to go through smoothly. Even within Mumbai, stretches like the Sea Link or a run-down to south Mumbai allow the DPF to do its passive cleaning without any driver input. So with your usage, the diesel auto won’t just be easy on fuel — it should also remain hassle-free in the long run.
    Dec 16, 2025
    Asked by: Amar J I have purchased the XUV 3XO AX5 Diesel AMT in white. My primary usage is my daily office commute, which is approximately 13km one way. I chose the diesel variant due to uncertainty around future fuel blends like E27, E30, E50, and E100. Please suggest what my driving habits should be to avoid DPF issues as much as possible. It’s unfortunate that a lot of half-baked stuff and wrong information online and on social media about E20 and ethanol has ended up confusing buyers — and, in your case, steered the decision the wrong way. There’s really no reason to worry about E20 with any new car. Every manufacturer has already set up their engines and fuel systems to handle it comfortably. Yes, you might see a drop in mileage, but there’s no question of faster wear or parts damage. Even when higher ethanol blends come in down the line, E20 will stay available as the regular grade, so compatibility isn’t going to be an issue.For the kind of driving you do, the Mahindra XUV 3XO turbo-petrol with the six-speed auto would’ve been the sweeter pick. It’s a smooth, effortless engine–gearbox pairing, far nicer to drive than the diesel-AMT combo. Given your daily run of under 30 km, the diesel’s lower running cost doesn’t really add up over time either.Now, about the DPF — that’s a system fitted to modern diesels to trap fine soot and burn it off once the exhaust gets hot enough. The catch is, on short city runs, the exhaust doesn’t reach those temperatures, which means the soot just keeps building up. The fix is simple: give it a proper highway run every few weeks so the system can heat through and clean itself.Still, the diesel 3X0 does score on economy, and when you stretch its legs, that lazy torque and low running cost won’t make you feel so bad about picking it over the petrol variant!
    Dec 16, 2025
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