When you book on Eva's site, you have an option to toggle the dates, you can toggle the fare classes (between Eco wow to Elite), and with two columns, "lowest price" and "Other Flights/fares"
After you select that, it will provide you with different times/flights (obviously lowest fares will limit your flight choices).
Once you select your flights, it will say your booking class on the right side below your itinerary.

Usually an Eco saver will get you an M class which gets TK miles

http://www.turkishairlines.com/en-in...you-fly/evaair

Hope that helps