Best Spark Plugs...for Gas Mileage?

[Rene M]

i Run the NGK and range 17-18 mpg in combination driving.

[blacksambo]

Thank you for the input. How about running on 10% ethanol (now mandated in New York State)? How does that effect your mileage versus straight petroleum? Thx

[VCrossfan]

I've been running the same set of Denso Iridiums-I16, for acouple years now ( about 25 to 30k ), not sure about the fuel mileage but it's a great plug, no probs here...

[UtahVXer]

Go with the best, NGK Iridium IXtreme: http://www.ngksparkplugs.com/product.../iridiumix.asp