Few months ago I went to the dealer and asked for price of synthetic oil, he told me $7.5 per quart. I need second oil change so went to the dealer today to buy filter and asked for the price of synthetic oil again. 0w20 full synthetic oil cost me at the dealer $4.59 a quart. Not sure if this was sale price, promotion or regular price, but I don't understand what the argument is all about, at this price there is not much difference between cost of synthetic and regular oil.