Spark plugs

[preston75052]

Hey guys,

Any suggestions for spark plug replacement for a 4.7L? Truck is about to touch 200,××× miles. Keep in mind, I'm a performance guy and fully believe in quality so hit me hard..lol

Also, I got full synthetic oil, been using Mobile 1, but I hear Castro GTX is good for Mopar. What are yalls take on that?

Any suggestions are greatly appreciated!

 

[JW1200]

I'm running the NGK ZFR6F-11G 6987, in my 2002. They are a step hotter than stock.

 

[macsx6]

Did you notice an improvement in mileage or performance with the hotter plugs?


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[preston75052]

I'm running the NGK ZFR6F-11G 6987, in my 2002. They are a step hotter than stock.

Nice! How many miles on your 2002? And have you noticed any difference in performance? You say they are hotter, do I want a hotter plug?

 

[JW1200]

Did you notice an improvement in mileage or performance with the hotter plugs?


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Nice! How many miles on your 2002? And have you noticed any difference in performance? You say they are hotter, do I want a hotter plug?

I just bought my 2002 in September, it has 193xxx miles on it. I went with the hotter plug so it would burn the fuel more efficiently. The plugs were old and haven't been changed in years, so yes I have noticed better preformance and fuel mileage. But I also changed most everything I can to get better fuel mileage. Rear 02 sensor is next on the list.

 

[Madslammer]

I have a 2006 ram 1500 4x4, 4.7L, 156k miles... it has a slight shaking when idling, service engine light is off, no codes on the scanner... Any ideas?

 

[preston75052]

I have a 2006 ram 1500 4x4, 4.7L, 156k miles... it has a slight shaking when idling, service engine light is off, no codes on the scanner... Any ideas?

Check your motor mounts.

 

[EWC88]

I need to do my plugs and wonder what would be the best option, I heard the stock plugs are best?

 

[usaf2006]

Stock copper plugs are best for hemi, not sure about 4.7