Originally posted by ghosthunter
Car manufacturer CAN adjust their car's ECUs to do exactly what these devices are doing. The reason why they don't is because they have to make sure their cars run well, smooth and RELIABLE even when their owners/drivers put regular gasoline (low octane) in their tanks.

Running an engine too lean can make it overheat too.
Woohoo!!! Someone finally hit the nail on the head!!! (I wonder why no one has mentioned this before... I knew this one also...)

Excessively lean running can cause heat damage to the inside of an engine.... Have you ever wondered why some ghetto turbo engines catch fire? That's because the engine leans out and the metal starts to burn. :D

This won't be as dramatic in slightly leaned out engines, but you may be exceeding specific factory safety parameters.