Below is an context that describes a sql query, paired with an question that provides further information. Write an answer that appropriately completes the request.  # noqa: E501
### Context:
CREATE TABLE cars_data (mpg INTEGER, cylinders VARCHAR, year VARCHAR)
### Question:
What is the maximum miles per gallon of the car with 8 cylinders or produced before 1980 ?
### Answer:
SELECT MAX(mpg) FROM cars_data WHERE cylinders = 8 OR year < 1980