Changing your driving habits from "slam the accelerator" to "accelerate slowly and evenly" or "brake hard to stop at the last moment for that stop sign" to "com

Changing your driving habits from "slam the accelerator" to "accelerate slowly and evenly" or "brake hard to stop at the last moment for that stop sign" to "come to gradual stop" is hardly as reckless as "Stop taking as much Warfarin as you are because our tests (with no proven reliability) says you could take a lower dose". Almost all the metrics you'd get out of of an ODB port would tell you to be gentler in your driving. Very few people feel comfortable in messing about with the guts of their car. Whereas many patients are more than happy to disobey their doctor's orders on a whim