Engine Oil Change Frequency Myth
Changing Motor Oil Every 3,000 Miles Isn't Always Recommended
California's Integrated Waste Management Board asks motorists to check their car owner's manual and follow the manufacturer's recommendations for oil change intervals
Recognizing the ecological risk used motor oil poses to the environment, the California Integrated Waste Management Board (CIWMB) recently launched an educational effort designed to reduce the amount of used oil generated in California. The campaign is intended to dispel the 3,000 mile myth, which is notion that engine oil needs to routinely be changed every 3,000 miles. Changes in engine technology and advances in oil formulations make it possible to go further between oil changes without harm to a car. Many car manufacturers recommend changes at 5,000, 7,000 or even higher values. The Board is asking car owners to check their owner's manual and follow their automaker's recommendations found there.
Hazards of Used Oil - Used engine oil represents an immense ecological hazard. Used oil is insoluble, remains in the environment for a long time, contains heavy metals, and is loaded with toxins. A gallon of used oil can impact the taste of a million gallons of water. Improper disposal or spills cause long term damage to the environment. California generates about 153 million gallons of used oil each year, but estimates are that only 59 percent of it is successfully recycled. The remaining 91 million gallons is available to pollute the state. In a press release, CIWMB Chair Margo Reid Brown says, "Used motor oil poses a great risk to the environment. With better made cars and the rise of synthetic oils, the 3,000 mile standard is not always recommended."
Normal Versus Severe Driving Conditions - Oil change recommendations are based on the type of driving done, normal or severe. Most drivers can use the advice given for operating under normal conditions. Recommendations are detailed in the owner's manual of each car. Some hallmarks of severe driving for oil change interval purposes are:
- Long periods of idling or driving in stop-and-go traffic
- Operating in cold weather, less than 10°F
- Driving in high heat, more than 90°F
- Driving in conditions of high humidity
- Repeatedly making short trips that are less than five miles
- Towing a trailer or using a car top carrier
Many drivers don't know how often to change their oil. Following the manufacturer's recommendations is good for the environment and will save car owners money. Don't extend the oil change interval currently being used until a thorough review of the owner's manual is complete. Allows follow the car maker's oil change recommendations. If you have any doubts, contact your car dealer or a qualified mechanic for advice.
