I know this topic had been discussed just getting updated views

[tryme]

Seems like every winter I have 1 spark plug that seems to be a little flaky.  seems like it will just miss once in a while the first time I take it out.  I am not patient so I just replace them rather than find out which one because it is not a bad miss.  only sporadic and at higher RPM.  so I have just been replacing all of them every spring.  once I replace them it runs great all summer.  my question is does the EPIC really require iridium plugs?  8 bucks a piece X 8 plugs gets expensive.  would like to use that money to the gas this summer.  I hear some people use cheaper copper.  good/bad idea?

[DENNIS]

I have always used 2000 Tundra plugs and change them out every year.  They are not iridium and cost a lot less.

Dennis

[Capt Rick]

On the boats I try to replace each year because there is no O2 sensor, so the plugs will foul from over-fueling.
Yes I use Autolight 3923.

Capt Rick

[tenn162000]

Are those auto lite pre gapped or what gap do you use Capt Rick?

[Capt Rick]

 checked at .043 inch

[sailtl]

I used the Autolite as recommended by Captain Rick every year and never had a problem. I installed in the fall after removing old plugs and install new ones after fogging cylinders and rolling the engine over by hand prior to putting in the new Autolite plugs.

[tryme]

Interesting read.  http://www.carsdirect.com/car-repair/copper-spark-plugs-vs-iridium-and-platinum-understand-for-top-performance

[sailtl]

GREAT Read!

[cyclone]

verrrrry interesting. makes sense. Toyota was going after longevity when a better less robust plug would do fine, swap every year. Well, my boat is running better than it ever has on the latest set of iridium plugs but I will replace every year with cheapie autolites for best performance, less pinging and damage to my unobtanium exhaust manifolds