The infamous star comparison on the back of oil jugs/bottles.
If I see a oil rated two stars (at cleaning/etc) and I see the Synthetic has four stars(out of a five star rating system, same company), I can say that the Synthetic is at least 20% better performance?
If I see a oil rated two stars (at cleaning/etc) and I see the Synthetic has four stars(out of a five star rating system, same company), I can say that the Synthetic is at least 20% better performance?
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