Kushal Desai
•4wHello Autocar India Team, First of all, thank you for your excellent insights and detailed reviews. I am an avid reader of your website and truly appreciate the depth of information you provide. I have recently purchased the Mahindra 3XO RevX A (Petrol AT, TGDi) and would like guidance on the recommended fuel for this model. Specifically, does this engine require 95-octane petrol (premium fuels such as XP95, Power, or Speed), or is regular petrol sufficient? I have read online but couldn’t find a clear answer: some sources say that after the introduction of E20 fuel, all petrol sold is effectively 95 octane, which adds to the confusion. Could you please clarify what fuel grade Mahindra recommends for this engine and whether using 95-octane petrol offers any real benefit? Looking forward to your expert advice. Kind regards, Kushal Desai

Autocar India
Much appreciated, and thank you for being a long-time reader of Autocar India.
To answer your question, yes, things have gotten a little confusing after the introduction of E20 petrol, but most of what you've heard is true. Since your new car - a Mahindra XUV 3XO RevX A TGDi AT - is relatively new, it will be E20 compatible. Therefore, you don't have to worry about blended petrol being incompatible with your car or causing it damage. These vehicles have been built with safeguards against the corrosive nature of ethanol. Any petrol will do, even the most basic type available at any pump across the country.
Secondly, yes, 91-octane petrol is now effectively 95-octane petrol as ethanol (which has a much higher octane than petrol) raises the overall number. As a result, many fuel brands have discontinued their premium-branded 95-octane option. Instead, only offer 99 or 100-octane (which, incidentally, has 0% ethanol) as the premium option. In short, you now really have just two options - 'regular' petrol (E20 - 95 Octane) and 'premium' (E0 - 99/100 Octane), and you can fill either in your car.
Mahindra XUV 3XO
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Posted on: 13 Feb 2026
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