I have an '03 fully-loaded (including automatic) ZTS that I absolutely love. However, I notice that when I drive
45 MPH around town, the car is in 4th gear and registers 1800 RPM. At this RPM, it seems to slightly bog-down, but not too badly. Just for kicks, when I turn off overdrive, it stays in 3rd gear at 45 MPH and registers 2800 RPM.So my question is, what is better (less wear, but proper mechanical dynamics) for the engine, a constant 1800 or
2800 RPM. It seems to run better at 2800 RPM. While we're at it, which would provide better gas mileage?Thanks, David.