Now, the color of your engine oil can actually tell you more about your vehicle's engine. For instance, if the oil shifts to a green or blue hue, that's a red flag indicating coolant contamination.

The Blue Diamond PAO diesel engine oil line has been expanded with a 10W-30 offering for heavy-duty use, diesel-powered vehicles. Utilizes 100% poly-alpha-olefin (PAO) Group IV synthetic oil and ...