Necessary to use double prong spark plugs?

I was changing my spark plugs yesterday and noticed there is a sticker that states that I have to use the double prong spark plugs and not the single pronged plugs. is this a true statement? what is the benefit of the dual pronged ones? TIA

 

not mandatory, just what is recommended. I used single electrode for years when I switched the first time. then when I started tracing my idle issues switched back to dual-electrode

here's a post regarding this. also if you do go single, make sure the gap is correct, I believe it's .44?

 

Thanks for the info. I am going to go to the dealership and just get the oem double pronged ones. I am also replacing my wires. Thanks again.

 

I used a single electrode copper core plug in my truck but it's for a turbo application. Single prong absolutely works fine. The reason dual electrode is used is because the 5vz uses a "wasted spark" ignition system. 1 coil fires 2 cylinders at the same time, so spark plugs will actually fire twice as much as a distributor system or a engine with 1 coil pack per cylinder. The dual electrode lets them live longer. I had a truck that had the original dual electrode plugs in it at 240k miles believe it or not.

 

Cheaper usually to get them elsewhere.

 

yeah, go to the auto parts store near you. I think I got all 6 for <$20 (~$3 a piece)

 

I got them from the dealership for 2.75ish a piece. Out the door was 17 bucks but also got 10% military off.