OK we will work this a different way. My main message is that for these type of devices to become more accepted than Dad,or Grandad, Or Uncle or previous media advertisment the manufacture needs to create a major PR campaign,
We know there is a group of car owners that would gladly increase their service intervals based upon the slimmest amount of technical justification.
We also know there is a group that will not change from what Dad taught them for almost any reason, (and Dad taught then 3 mths or 3000 miles).
But their is a main group that can be persuaded to ignore what they have been taught and go with what the computer says. I believe the effort to grab this group will include a major media campaign on why they should trust the data displayed by these devices.
As it is know the only way the word is getting out is via salesman and service advisor, not a place I would want to be.