Thought I'd follow up on these relatively inexpensive gems. They came recommended by the "hole in the wall" tire shop I frequent, and since they've never steered me wrong, I bit. $75 per tire, $150 for the front pair OTD.
Initially, efficiency numbers suffered, noise & ride seemed no different, traction/handling improved. After ~2,000 miles (a month of driving for me), efficiency had gotten better. Occasionally I've seen some trip numbers doing local driving, where wind and elevation aren't really factors, that just boggle the mind 9+mpkwh. On the highway, it still doesn't seem quite as good as ecopias, but that could just be imaginary.
Overall, I recommend these tires.
https://www.amazon.com/Lexani-LXTR-203- ... B076ZSD82R
Also available to order @ some Wal-Mart Auto Centers & perhaps your local tire shop.