schuylkill
Thread starter
Another pondering, how do car companies come to recommend an oil for their engines? In this case, how did Hyundai come to an arrangement with Quakerstate, is there any testing involved or is it strictly a business deal? Since mpg is a concern these days with marketing and such I wonder if it is more than payola or whatever involved? Any links to where this may be discussed, I haven't found any info.