The obvious answer would be to stay at the speed limit. Also, coast more. You have a stick so that is easy. Just push in the clutch and glide.
Here are some more discreet suggestions:
1) Ensure that your engine is properly tuned. Poor compression in the cylinders or a clogged air filter drastically affect fuel economy. Your engine will run more smoothly, which equates to greater efficiency, which in turn requires less fuel.
2) Inflate your tires to the recommended pressures (or 2-3 psi over if you don't mind a slightly rougher ride). This reduces rolling resistance.
3) Remove luggage racks, bicycle racks, or any projecting object that can be removed. This improves your car's aerodynamics more than you would think.
4) Drive with the windows down rather than with the A/C when driving around town. On the highway, the difference between the two is negligible.
5) Keep RPMs as low as possible. Your engine functions more efficiently at lower RPMs as there is less friction among moving parts.
6) Accelerate at full throttle, but shift at like 2000RPM. Your acceleration will be the same as if you shift at normal shift points. I know this sounds counterintuitive, but doing so reducing pumping losses. This only matters if your fuel pump draws power from the engine (which yours does). This technique takes some getting used to, and it only increases efficiency by 1-2%. It really isn't a big deal.
7) The alternative to (#6) is to accelerate very conservatively. The reason for gain is obvious.
I have tested several of these techniques. For example, just by coasting whenever possible, my fuel economy increased from 20mpg to 22.5mpg. I cannot test some of these since I have an automatic transmission. Most of my driving, like yours, is done around town and in the same speed range.
· 1 decade ago