Changing plugs on 2011 Shock 4.0L 4x4

[nitroblast]

Your so right dhh3 .. They will turn their head on you when something goes wrong ..not to mention the plugs that come in the nitros are very high end platinum plugs and are rated for 100k pluse ..

[polishfly]

Hey guys,

I just recently changed my spark plugs on my 2007 Nitro R/T 4.0 with 77k miles on it because the engine was a little sluggish. I installed Bosch Platinum +4 plugs and it seems like my MPG went down...from 18.6 to 17.7 average (this is in 2 days of regular driving to and from work). I will be going on a road trip this weekend which will total about 2500 miles. I will keep you guys posted on the mileage. (PS, to the effect of the engine being sluggish, the new plugs seem to give it its power back).

To my question...has anyone had any experience with any other spark plugs other than stock? I am looking at NGK Iridium IX plugs and also Autolite Iridium plugs. From reading some other forums the E3 Diamond Fire plugs seem to kill MPGs as well. Any feedback would be great!!!

Thanks in advance.
Paul