I got some Bosch Platium 4+ really good spark plug

 

Don't count on E3 spark plugs to save you money

Don't count on E3 spark plugs to save you money on gas -

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.

 

Total BS. Spark plug choice on a boosted flat 4 is very different than in a big American V8. I'd be willing to bet there's a 0hp 0wtq increase using these plugs. Stock iridium or 1 range colder is all anyone really ever needs. Copper are also a good choice but require more maintenance since they have more frequent change intervals. Beyond that there is very little gain to be had screwing with the type of plugs themselves.