Answer:
128 days
Explanation:
To solve this problem, we simply have to divide the total amount of oil in the tank by the amount of oil used each day.

So, the tank will be empty after 128 days.
Note that the number of days is approximate; normally when measuring in the real world, whole numbers are used, as decimals in certain contexts (like in this situation) are confusing. So to simplify our answer, we can simply round up to 128 because by the end of the 128th day, the tank will be empty.