I drive in a rush hour traffic alot on the highway going from 0-20 MPH. My 1-2 shift is at 15 MPH (SCT TUNE) and 2-3 shift at 26 MPH. Is it better if I keep the car in first gear if you are in this situation, so it doesn't keep switching from 1-2 at 15 MPH? or keeping it at second gear better so it doesn't reachh that high of an RPM at 20 MPH which would happen in first gear?