How necessary is it to use premium grade gas in a MINI Cooper base model (not an ‘S’ or larger model)? What are the potential problems from using regular gas? Thanks.

MINI Cooper Gas

Joseph_E_Meehan February 25, 2011, 11:12pm 6

You might also remember that using regular fuel in a car designed to use premium may result in higher fuel cost since you will get less mileage in a car designed for premium if you use regular.