Natural rubber helps YOKOHAMA's Avid Ascend save more than 100 gallons of gas--and more than 2,100 pounds of CO2--over its life. That says a lot, given that this reinvented wheel goes 17,000 miles farther than most. Its rolling resistance rate is 20 percent lower than that of conventional tires, but performance doesn't suffer: Grooves channel water away while orange oil improves grip. Price varies by region, yokohamatire.com

Running your vehicle through a car wash uses more than 45 gallons of water. The hose-in-the-driveway method can waste even more, and the runoff goes into storm drains. ECO TOUCH's Waterless Car Wash evokes Karate Kid Zen: Just spray on, then wipe off. The liquid is biodegradable, phosphate-free, and nontoxic. And thanks to citrus essential oils, it smells nice too. $13 for a 24-ounce bottle, ecotouch.net

You'd think nothing could be more petrochemical than motor oil, but VALVOLINE has good options both conventional and synthetic. MaxLife NextGen High Mileage Motor Oil is 50 percent recycled and double-refined to extend engine  life and improve fuel efficiency. It's manufactured via a process that uses 90 percent less energy than cranking out standard engine oil. $5.50 for a 1-quart bottle, nextgen.valvoline.com

Sebastian Blanco, the lead blogger for AOL's AutoblogGreen, alerted us to a device called LUBRICHECK. "In only a few minutes," Blanco says, "it'll help you tell if your oil is still good, which could spread out your trips to the service bay." $40, lubricheck.com

Forget those dangling trees. They may be shaped like the Sierra Club's logo, but there's nothing natural about those chemical-swathed "pines." To freshen your car, choose an organic plant-oil spray like AMALA's spritzable mists in peppermint, lavender, or rose. The German company never tests on animals and is certified by Natrue (natrue.org). $24, amalabeauty.com