On the frosty morning of Dec. 9, 1921, in Dayton, Ohio, researchers at a General Motors lab poured a new fuel blend into one of their test engines. Immediately, the engine began running more quietly ...

Engine knock, wherein fuel ignites unevenly along the cylinder wall resulting in damaging percussive shockwaves, is an issue that automakers have struggled to mitigate since the days of the Model T.

An editorial earlier this summer (“Don’t let children near Colorado’s airports suffer the same fate as kids in Flint, Mich.” July 11, 2023) focused on an important issue, but grossly oversimplified ...