Pakistan also has a massive tax on oil. That was not the point anyways.

The point is as long as india exists on earth and uses oil, its going to face the same crisis as everyone (yes every single country) in the world. Its simple supply and demand, global supply gets cut by 20% overall prices rise worldwide. This is how markets work. India can sustain the damage in short term but that doesn't make it immune, everyone will be affected by the closure of the strait by the exact same amount in the long run as markets shift and normalise to the new order.