Chevrolet Cadillac Of Santa Fe

I told the car dealership service department on 10/14/16 that I am out of town traveler from Massachusetts, and need a oil change. I brought my car to the dealership, a female service advisor orally quoted me $71 for the synthetic oil change. When it was done more than one hour later, the service advisor increased the service fee 107% to  $147! The reason: the oil change need 8 quarters instead of 6 quarters (33% increase). What a ripoff!!