Discussion
Nope. There is no way of being sure except watching them open the can and poor it in.
However, if you find a garage you trust then you should be okay. In fact a decent specialist will probably recommend oil that they have found works best over a number of years. This is better than any manufacturers recomendation.

However, if you find a garage you trust then you should be okay. In fact a decent specialist will probably recommend oil that they have found works best over a number of years. This is better than any manufacturers recomendation.
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