Can I upgrade my MacBookPro Model6.1 8GB (2x 4GB) to 16GB (2x 8GB)
Apple's specs for the Mid 2010 17" MacBook Pro state the maximum is 8GB.

OWC maintains a list of Macs that can accept more RAM than Apple's official numbers. Unfortunately the Mid 2010 MBP is not on that list. (Do not confuse it with the Mid 2010 13" MacBook.)