OBD2 fuel savers are devices that claim to improve your car’s fuel efficiency by altering engine parameters through the OBD2 port. These devices often promise significant increases in gas mileage, but do they really deliver? This article examines the claims made by manufacturers and explores whether these devices actually work.
One example of such a device is the Platinum Gas Saver, which retails for $248 for two units. The manufacturer, National Fuelsaver Corporation, claims a guaranteed 22% increase in fuel mileage and extended engine life through the removal of carbon deposits. It works by connecting to a vacuum line in the intake manifold and supposedly introducing microscopic amounts of platinum into the air-fuel mixture, leading to cleaner and more efficient combustion.
However, independent testing has shown different results. In tests conducted on a Nissan Altima and a Ford Excursion, no discernible changes in fuel economy were observed after installing the device. The tests included standard acceleration and fuel economy runs, both with and without the device installed, following the manufacturer’s installation instructions.
The manufacturer suggests that the device might require 200 to 1,800 miles to become fully effective. They also recommend advancing the engine timing by 10 to 12 degrees and/or replacing oxygen sensors for optimal performance. However, these actions themselves can improve fuel economy if the timing was initially incorrect or the oxygen sensors were malfunctioning. Even after 500 miles of driving and replacing the oxygen sensors in both test vehicles (despite them being new), no improvements were recorded. Furthermore, modern vehicles often utilize computer-controlled electronic ignition timing optimized for emissions and fuel economy, making manual timing adjustments impossible. Over 1,800 miles of driving yielded no overall fuel economy improvement. In addition to the cost of the device, consumers could incur additional expenses for new oxygen sensors and labor, around $140 for the test vehicles.
Ultimately, achieving optimal fuel efficiency relies on adhering to the manufacturer’s recommended service schedule and adopting fuel-efficient driving habits. Focusing on regular maintenance and mindful driving practices often proves more effective than relying on aftermarket devices promising dramatic improvements. Instead of investing in potentially ineffective fuel-saving gadgets, drivers should prioritize proven methods for maximizing fuel economy.
For reliable information on improving fuel economy, consult reputable resources like the guide to fuel economy.
