I am not new to hondas but very new to swapped hondas. What kind of highway gas mileage can I expect from my 90 si hatchback project with a B16ai, I/H/E, quaife, ys1 trans, 16inchers with 205/40s, pw0 ecu? Ball park quesses are fine, but I would like more accurate numbers. I am not really sure why I bought this car and I really need to find a use/excuse for it. And my turbo rx7 has quite an expensive thirst for premium. Also, can I use regular or is premium necessary? I will probably use premium because I normally do, but just curious.