Royal Purple is an interesting brand of motor oil. I can't tell you the number of times I had customers bring their own purple bottles in for oil changes, all the while lecturing me on the merits ...

Royal Purple's brand of synthetic motor oil, which is enhanced with a trademarked blend of additives, is reasonably priced, well regarded, and sports a 4.9 star average on Amazon with nearly 4,000 ...

However, that doesn't mean Royal Purple should be counted out entirely ... An endorsement from a major manufacturer is one ...

Calumet, Inc. (NASDAQ: CLMT) (the "Company," "Calumet," "we," "our" or "us") has successfully closed its previously announced sale of assets related to the industrial portion of its Royal Purple® ...

The sale includes Royal Purple’s synthetic industrial product line, which encompasses gear lubricants, bio-environmental lubricants, stationary natural gas engine oils, hydraulic lubricants ...