Firefly Aerospace is returning its Alpha launch vehicle to flight after a nearly 10-month stand down following the failed FLTA006 “Message In A Booster” mission in April 2025. FLTA007 “Stairway to ...

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.

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 ...