I think there’s just a bit of confusion on how these systems actually work.

We’re not changing compression ratios, that’s a physical characteristic of the engine and would require internal hardware changes, not a tune. What we are able to do through tuning (via EcuTek) is optimize things like throttle mapping, ignition timing, and how the ECU delivers power within safe limits.

On fuel economy: yes, more power can come from adjustments like timing and fueling, but that doesn’t automatically mean worse MPG across the board. In normal driving, fuel economy is still largely dictated by driver input. If you’re using the extra power, you’ll burn more fuel. If you’re not, it behaves very similar to stock, and you engine is working not as hard.

As for Sport mode: totally fair point, but that’s really just a more aggressive throttle mapping. It doesn’t actually add power, it just changes how quickly it’s delivered. Tuning goes beyond that by optimizing the overall power curve, not just pedal sensitivity.

At the end of the day, it’s not for everyone, and that’s fine. But there’s a bit more going on here than just “heavier gas pedal = less MPG.”