Description: This is a logo for Royal Purple (lubricant manufacturer).
Source: The logo may be obtained from Royal Purple (lubricant manufacturer).
Purpose of Use: The image is used to identify Royal Purple (lubricant manufacturer), a notable product or service. The significance of the logo is to help the reader identify the product or service, assure the readers that they have reached the right article containing critical commentary about that product or service, and illustrate branding associations of the product or service in a way that words alone could not convey.
Fair Use - This image is copyrighted but used here under Fair Use Guidlines The Fair Use Guidlines can be read here on Wikipedia: 
Owner: Royal Purple, Inc