Hey I just bought my Z this month and noticed that the dealership had just done an oil change on it. Then I found a bunch of paperwork in the glove box from the previous owner and among it was a reciept of an oil change with synthetic oil. So my question is, does the dealership use synthetic oil and if not will that hurt my engine seals/gaskets? I was always told not to ever change types of oil once you start using them. And should I use synthetic for my next oil change or not? Thanks in advance for any answers.
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