I agree 100% and have for many years now...Just get the OE plugs, you don't have to buy them from Nissan, but get them...I've been an auto tech for a few years now working on alot of cars and trucks, and for imports oem plugs are the best and most reliable you can get. That much is a fact. Unless you have a reasonable amount of "mods" then you dont really need a different plug. I'm just going to try the e3 to see if i get any increase in mpg. Any real difference in a stock vehicle will not be real noticeable i think. The only real way to tell is buy different plugs and try them, log the data and see for yourself.