If you take your car to most indies they will use any oil which they have in stock, usually the barrel in the corner. They neither know nor care about using the correct oil as they know best.
When I had my Passat I sent it for a service and the boss insisted that their oil was up to spec although it hadn't got the relevent VW specs on it. I sent my own Castrol Edge 5W/30 which I hope they used.
If you want your car properly serviced take it to a franchised dealer or a independent which specialises in your make. Or do it yourself. Do not trust your local garage to use the proper stuff and when it goes wrong they won't want to know.
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