Engine oil turns black from a combination of combustion byproducts, heat oxidation, and detergent additives suspending c ...

Engine oil color reveals its age, contamination level, and operating condition. Fresh oil is amber or light brown. Oil darkened to black but still translucent after a few thousand miles is normal.

Given the chore of changing it every few months, the typical motorist realizes that engine oil degrades over time. Some will also notice the mysterious codes for the different grades—10W-40, 5W-30, ...

On February 17, 2026, London Co of Virginia disclosed a sale of 36,512 shares of NewMarket (NYSE:NEU), an estimated $27.88 million trade based on quarterly average pricing.

ULAS HiPR is designing and producing what it claims is the first additive manufactured liquid rocket engine in the Republic of Ireland.

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.

Ursa Major has successfully hot-fire tested the latest variant of its Hadley liquid rocket engine for the first time. The engine, which is flight-proven, has recently undergone a series of design ...

Picking a high-quality gasoline brand matters: warning signs to look out for and the brands across the U.S. that fail to meet the standards of quality.

AI recommendations are decided upstream. Understand the 10-gate pipeline, where brands fail, and how small improvements ...

A US-based aerospace and defense company has successfully carried out the first hot-fire tests ...