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I know a lot of riders currently use Shell Rotella CJ-4 in their bikes(Myself included) since it is Jaso rated, plentiful and reasonably priced. I'm wondering if anybody has any insight as to how the new ratings will affect use in motorcycles. The CK-4 is supposed to be backward compatible but I also read that they may have the current wear additives like phosphorus replaced by newer, less polluting additives. Not sure how this would effect use in MC's. It seems like the specialization of oils will continue with new mileage mandates and CO2 emission's. The day of using HDEO's for bikes may be coming to an end???
 
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