Mazda RX-8 2010 Owner's Manual page 151

Driving Your Mazda
Starting and Driving
For cruising
Gear
1 to 2 23 km/h (14 mph)
2 to 3 34 km/h (21 mph)
3 to 4 45 km/h (28 mph)
4 to 5 56 km/h (35 mph)
5 to 6 68 km/h (42 mph)
Downshifting
When you must slow down in heavy
traffic or on a steep upgrade, downshift
before the engine starts to overwork. This
reduces the chance of stalling and gives
better acceleration when you need more
speed.
On a steep downgrade, downshifting
helps maintain safe speed and prolongs
brake life.
5-12
Vehicle speed