Ferrari is exploring a groundbreaking approach to the internal combustion engine, as revealed by a recent European patent ...

But it also means that mixing the fuel and air can be tricky, which is why diesel engines have specially-shaped pistons. A diesel engine's piston head looks like someone took a scoop out of the top.

If the vehicle continues to run in this condition, the engine could become damaged, causing a loss of motive power. This could even cause a fire due to engine oil leaking onto a hot exhaust component ...

The recall affects 53,635 Seltos and 83,621 Soul vehicles, totaling 137,256, and the problem could require a replacement engine. The issue stems from a potentially defective piston ring ...