I had to take my car for an oil change on Friday. I had a coupon for a free one at the dealership, but was sure they'd find something else that needed to be fixed on the car during the complimentary diagnostic. [I actually really like this particular dealership service center and find them to be quite honest. It's just that my car is not very new and it's never a surprise if something needs to be tweaked or fixed]. 45 minutes later my oil was changed, my brakes looked great and the tread on my tires still has a lot of life left! Total cost = $0. By far the best present of the weekend!