Your running of just 500km a month and mostly on the highway doesn’t justify an EV. It will take many years to recover the extra cost of buying an EV, and on the highway, the charging infrastructure is still a hit-and-miss. Also, it is not advisable to hang onto an EV for 10-15 years, as it depreciates badly and the battery stands to become obsolete.
In view of this its better to stick to an ICE vehicle because your worries on the E20 and E27 are unfounded. All manufacturers have upgraded components and materials to be E27 compliant, though the regulations only call for E20 compliance. This is to future proof themselves and customers in case the ethanol blend goes up from the current E20 mix which it is unlikely to for next couple of years. In any case, E20 will be the base fuel for many years. So if you are looking at value, the Mahindra XUV 3XO is a good choice - dont worry about it being ICE.



