March 2013 - Test Results for AP
I'm currently running the API version of Royal Purple 5w30.After seeing the results in the latest pqiamerica.com in march,I see alot of similarites in Napa synthetic and Royal Purple.
I'm hoping someone can explain to me why since they are formulated so similiar,why is RP so much more expensive?
I'm currently running the API version of Royal Purple 5w30.After seeing the results in the latest pqiamerica.com in march,I see alot of similarites in Napa synthetic and Royal Purple.
I'm hoping someone can explain to me why since they are formulated so similiar,why is RP so much more expensive?