The factors that can contribute to gas savings and lower emissions are the following:
- Weather- warmer air and road temps will increase you mileage, colder temps will lower them due to various factors such as air density, temps effects on mechanical parts and engine lubrication.
- Momentum: also try to maintain momentum by anticipating stop light changes and by avoiding the needless use of brakes.
- Speed: avoid speeds above 55 mph and maintain steady speed at all times; gas savings up to $0.51 per gallon.*
- Weight: remove all extra weight from the vehicle; gas saving up to $0.04 per gallon.*
- Air resistance: remove roof racks when not in use; reduces frontal area to decrease drag.
- Initial startup: the worst mileage and greatest emissions will be in the first 5 minutes to 5 miles, on a cold engine. Never idle your vehicle after startup, just drive off slowly.
- Coasting: when practical, put engine in neutral and let vehicle naturally coast on hills.
- Drafting: to be used cautiously with safety first in mind, however drafting reduces air resistance against your vehicle.
- In highway driving, 50% of all energy is used to overcome drag / rolling resistance. Higher speeds=more drag/resistance*
- Idling gets 0mpg and can consume up to 1 gal of gas per hour. Excessive idling can cause damage to engine components.^
- Tires: inflate and constantly maintain pressure to maximum sidewall PSI on the tire; gas savings up to $0.10 per gal.*
- Oil: consider low viscosity synthetic oil to give maximum engine lubrication; gas savings from $0.02-$0.05 per gallon.*
- Tune-up: consider regular tune-ups to maintain engine efficiency; gas savings of $0.10 to $0.88 per gallon.*
- Block Heater: engine block heaters can increase mileage and lower emissions at initial startup. A timer should be used with a 3 hour limit; consider use of a radiator block; this can increase cold start efficiency by 10% and lower emissions by 60%^
- Daily Logbook: consider recording gas purchases as well as daily mileage to determine trends and performance.
- Decide which route to take (freeway/highway/street) depending on time of day (rush hour), weather conditions (snow or rain) and terrain (hills and stop signs)
- When you start your vehicle after sitting for 1 hour, it pollutes 5 times more than when the engine was warm.
- Combine trips, going to the farthest first and then coming back home; short trips from a cold start use twice as much fuel.
- Always try to leave space between you and other vehicles to allow you more options in changing driving conditions
- Acceleration: always come up to speed in a moderate and steady manner. Avoid sudden speed increases.
- Stopping: avoid complete stops when possible. Anticipate intersection traffic to avoid coming to a complete stop.
- Speed: will kill mileage. Try to go the speed limit or 5 mph below as traffic conditions allow. Steady speed is best. with few impulsing. Each 5 miles above 55mph is like paying $0.10 per gallon more for gas.*
- Parking: always look for face out parking to avoid using reverse gear. Face to the sun in winter for solar heating.
- Hills: decrease speed to go up a hill and then coast on the downhill or regain speed.
- AC and Cruise: avoid the use of AC when bearable and do not lower windows completely. Use cruise only at highway speeds and on level roads and avoid its use in hilly terrain.*
- Maintain a safe following distance to reduce stop and go driving and to allow you better driving options.
- Aggressive driving wastes gas 33% at highway speeds and 5% around town. That’s $0.15 to $1.00 extra per gallon.*
- Avoid idling more than 1 minute; restarting adds $10 per year in operating cost and reduces emissions and engine wear. +
* U.S. Department of Energy (based on $2.31 per gal) ^ Natural Resources of Canada + Clean Air Wisconsin
If you are happy when you notice gas prices go down by several cents per gallon, imagine your joy when you know you can control that savings by many times over by just changing your driving style, everyday.