The Most Fuel Efficient Spark Plugs

[Davo53209]

For awhile now, I've been attempting to deterime which company, by reputation or research, is reknowned for making the most fuel efficient spark plugs & wires. Now, just to be clear, I'm not expecting to get a drastic increase; however, I am looking to get a the best bang for my buck.

So far, I've seen everything from Iridium plugs(i.e. Denso & NGK) to platinum plugs(i.e. Bouch Platiniums, Platinum 4)to plantinum/iridium infusion, as well as something called the E3 sparkplug. I was wondering if anyone in the forum has had any experience with these along with any tips that could be offered.

Thanks.