Collecting all this data on your car worries me as we already get errors and misinterpretations with current sensor systems. Recently I got a small leak in a vacuum pipe - this generated an error which then cascaded down through the system to be finally reported as an automatic gearbox problem. A friend's car is forever telling him that he has an OSF puncture when he hasn't!

Also there is a "data for data's sake" mentality. I spoke with a supposed IoT guru a couple of years ago and he was keen to collect ever more data (even increasing the sampling rate). My background makes me look for "relevant" data potentially disregarding a large percentage as "irrelevant noise". There was no way we would ever agree!