Only fuel-ups will export/import currently (limitation on the website at the moment).
Which is why I recommend exporting the vehicle with only 92 records. Shouldn't be too many service records (~8) that you'd have to reenter manually.
Once you've completed the export/import process, you can then safely Edit->Delete the first vehicle (with the 92 records).
There will not be any need to edit the export file in anyway, so as soon as you've exported/saved it to your desktop, then view the receiving vehicle and tap import and upload the csv you just put on your desktop. It should be a relatively smooth process.