Some things to keep in mind is to keep up on routine engine checks. A bad oxygen sensor can reduce fuel economy by as much as 40%.
It's also important to take it easy on the road. Revving the engine, quick acceleration and high speed travel reduce your miles per gallon much faster than you may realize.
Also remember to check those tires. Fuel economy drops by about half a percent for each psi below recommended inflation pressures, costing you as much as a couple miles per gallon.
Timing is everything. Stop-and-go traffic, crowded roads, and looking for a parking space are all fuel-burners. Try running your errands outside of rush hours and peak shopping times. Not only can you save time getting there and parking, but its often cooler at these times so you don't have to run the air conditioner.
But when you're driving on the interstate, its more efficient running your car's air conditioner that it is to roll down the windows. The aerodynamic drag caused by open windows takes more energy to overcome than operating the A/C compressor.
Click For Full Article by Katelyn Sykes