Quote:
Originally Posted by bawareca
There was a problem with this before and now Castrol bottles are marked "Full Synthetic" and "Synthetic blend".
From what i know the black bottles castrol is a full synthetic and that is what the bottle says.
I didnt send any oils for analysis, but judging by the visual condition of the oil I drain after 7-8 k miles it cannot be anything than a premium oil.
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It still is a problem. The US based synthetic oils that Castrol sells cannot be sold as synthetic anywhere else. It comes down to what Castrol views as a synthetic oil, not how it is marked on the bottle. Their view of what a synthetic oil is different in the US compared to the oils they produce in Europe.