Consider synthetic oil.

I've written before about biodiesel, hybrid cars, and other ways your fuel and car choice can affect the environment, national economy and more. But what if it's not time for a new car? Even if you are not ready for a new alternative fuel vehicle, you can make a positive contribution to our world by choosing synthetic oil over petroleum-based oils. Here's what you need to know:

When one considers manufacturing and engine use, synthetic oils produce just as much pollution as petroleum-based oils. BUT, since synthetics last three or more times longer than petroleum-based oils, they don't have to be changed as often. That means less total oil is used. That's important since 40% of used oil is dumped on the ground or down the sewer, polluting the environment. Plus, it's more convenient!

Want to know more?

* Learn about used oil pollution. For example, "it is estimated at present that over 240 million gallons of oil are improperly discarded annually. Dumping 240 million gallons of oil is nearly the same as two Exxon Valdez spills each month. How dangerous is used oil? Just one quart can produce a two-acre oil slick. One gallon of oil can make one million gallons of water too foul to drink and 35 ppm of oil will kill fish. Improperly disposed used oil is dangerous."

* Consider this FAQ from Quaker State. It will address many of your questions about use of synthetics, switching to synthetics, etc.

* Read your car owner's manual to see if your car can use synthetic oil. For example, Mazda engines cannot.

* Recycle used oil it when you remove it, regardless of which type you use. "Just one gallon of used oil can contaminate 1 million gallons of water. Recycling your used motor oil keeps it out of our rivers, lakes, streams and even the ground water. In many cases, that means keeping it out of our drinking water, off our beaches, and away from wildlife." There are sites all over that will accept used motor oil for recycling. Consider these in the UK, and the US. In the US, you can call 1-800-CLEANUP (1-800-253-2687) to find a collection center near you. Some oil change companies, like Jiffy Lube, will accept used motor oil for recycling. Never dump oil down a storm drain.

So next time your car is due for an oil change, recycle the used oil and consider replacing it with a synthetic oil. It's better for the environment and easier on you.

"Remember not only to say the right thing in the right place, but far more difficult still, to leave unsaid the wrong thing at the tempting moment." - Benjamin Franklin