Batteries

Car batteries from Sears (marketed under the "DieHard" brand name) and Walmart are rated highly by Consumer Reports magazine (2001). Import enthusiasts often buy the hyped Optima batteries. The cheaper batteries from Sears and Walmart offer the same, if not better, performance in terms of cold-cranking amps and reserve capacity.

As Seen on TV products

"Put a Tornado under your hood!" exhorts the manufacturer of a $70 device that claims to improve your vehicle's power and mileage. The Tornado, a stainless-steel disc with stationary blades, fits inside the air-filter housing or air-intake hose. "Its air-flow dynamics create a swirling, fast-burn effect" and allows for more complete combustion, the ads say. We tested the Tornado on a 1998 Volkswagen New Beetle and a 1999 Ford Ranger pickup. In our acceleration tests, the Ranger showed no improvement and the Beetle showed slightly worse performance with the Tornado. Fuel economy didn't improve in either vehicle. - from Consumer Reports.

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