Well.. the extra charge actually comes out becuase of the price difference between 0W20 and 5W20. It just just like.. deducting the 5W20 that they put in before, and charging me the 0W20 price on the bill.

 

one thing that suprised me also is that they use 5W30 for all vehicles unless specified. I wonder how many people would go in and know/request any specific oil weight. Honestly speaking, if i have time, space and technique to do my oil change, i would rather do it by myself.