- Oct 21, 2007
Don't count on E3 spark plugs to save you money on gas
Spark plugs have long been a popular area for "innovation" of this sort. One of the latest comes in the form of the E3 spark plug featuring its DiamondFire electrode. This one falls into the plausible-but-unlikely category. Writer Larry Edsall recently undertook the latest iteration of a 5,000 mile annual road trip and decided to try out the E3 plugs. While E3 claims a 3-5 percent improvement in mileage, Edsall found his dipped from 20.11/19.98 the previous two years to 19.18 with the E3 plugs. He did all the usual maintenance like oil changes and tire pressures before leaving. Of course the vehicle was a year older and more worn which may have contributed to the dip. But even a fully scientific test with two or more vehicles running side by side in the same conditions (aside from the spark plugs) would probably yield a negligible difference at best. The E3 plugs aren't that pricey ($6-7 each) so if you do choose to try them it won't cost a lot. Just don't be too disappointed if you don't see much improvement in mileage.
[Source: Detroit News]