Ecoroute HD - How many vehicles?

 

I'll be using the HD on my own car most of the time, but part of the reason I bought it is so I can troubleshoot any error codes that may come up on my own car as well as those of my fiancee's car and also her mother's car.

From what other users have stated, I know that you can use the unit on more than one vehicle and it will remember the other vehicles after the initial setup. I suspect there is a limit to how many vehicles and be retained in memory and was wondering if anyone knows this number?

Thanks

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Drivesmart 66, Nuvi 2595LMT (Died), Nuvi 1490T (Died), Nuvi 260 (Died), GPSMAP 195