Red-Rx7 wrote:My 93 TT was averaging about 17 MPG on the highway. City was much much worse. I had upgraded to free flowing exhaust, so it wasn't stock at the time.
When you say on the highway, are you cruising or boosting? I've got to record lows of ~12mpg (estimated) on the highway, but i was spooling the turbos and between 120-140 the whole time. And that was stock boost - if you turn it up your mileage will drop much more. Generally when people talk about highway mileage they mean not boosting, just cruising at a normal speed. If you were just cruising, something's wrong. I averaged ~24mpg not boosting, with the very best near 27mpg.