A LARGE input of work is required to compress the air*, which returns SOME OF that energy as the air expands in the vehicle. There is no energy savings here, merely a displacement of emissions from the vehicle to the compressor station, or the utility that provides electricity to the station. Yawn...

* ever wonder why construction compressors, often proudly wearing the Ingersoll Rand logo, are the size of a U-haul trailer?

The last bullet point about "What will the Oil Co's do to stop it" is laughable. Large compressors are often fueled by diesel fuel. Given the inherent inefficiency of this scheme, the OilCos will absolutely LOVE it.