Engine oil turns black from a combination of combustion byproducts, heat oxidation, and detergent additives suspending carbon particles in the fluid. Black oil is not automatically a sign of a problem ...

Why the next heavy-duty engine oil category matters for durability, maintenance planning and equipment decisions beyond 2027.

The new heavy-duty engine oil category, PC-12, is nearing the finish line. Here’s what fleet maintenance managers should know before it arrives in 2027.

A mechanic cracked open a neglected engine and what he found was brutal.

Long before Hollywood reshaped Los Angeles, the region was famous for something far less glamorous: oil. California was once the world’s largest producer and exporter of crude, and L.A. sat at the ...

Should you put fuel additives into your car? As time passes, the fuel system in your vehicle can get a little dirty as carbon deposits build up and other contaminants clog up the area.