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A lot of new motorcycles are now fitted with cats, yet the motorcycle synthetic oils don't seem to damage them.
I don't want to start another oil thread war, but one thing that seems to be a common opinion is many of the well known performance car lubricants have lost their synthetic Group IV rating and it occured to me that the motorcycle oils may still have the higher specs because of the higher temperaturs and the shearing problems associated with the oil that also lubricates the gearbox.
Your right about the price of Motul bike oils - if you think its expensive in the US, its about the same price of a new kidney here in Australia......
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