"It's really important to thoroughly test your own product and be really tough on it before you give it to general customers," Musk told the crowd of roughly 100 investors, gathered at the Computer History Museum in Mountain View.
When pressed by an investor on Wednesday, Musk said the company should start turning a profit after selling about 8,000 of the new sedans.
He has made that forecast before, and indeed, Wednesday's meeting produced few surprises. Musk said Tesla would probably start offering leases next year, or possibly late this year. He said it would be "cool" if Tesla someday made a version of Google's experimental self-driving car.