Actually, all modern emissions-compliant cars control lambda closed-loop by automatically adjusting fuel delivery, and will drop power if signals from oxygen se

Actually, all modern emissions-compliant cars control lambda closed-loop by automatically adjusting fuel delivery, and will drop power if signals from oxygen sensors are out of the ordinary. That's required by emissions regulations. So, no, it can't. Moreover, due to speed limits, any power increase can only be realized over very short times anyway. And while in principle you are correct about the suspension, suspension wear is not based on available power but on speed and road conditions. Since my warranty wasn't voided by driving in Boston (which has horrific road conditions compared to the Bay Area) or by speeding, it shouldn't based on increasing power either.