Contrary to popular opinion, the slowest acceleration is not the most efficient. Engines are more efficient at higher torque but less efficient at higher RPMs. You want to accelerate as much as possible without letting the RPMs go too high (over 2500-3000 for many engines).
by Morgan on January 24 2010
Manual Transmissions - Shift at lower RPMs
For those of you who drive stick, upshifting at lower revs ...
by realgeneric