when are you guys/gals changing spark plugs?

[MichaelL]

i'm over 100K miles on my '00 rado.............been mostly highway miles, and haven't noticed any dip in fuel mileage, but have been experiencing slight pinging lately.

i'm sure the answer is do it now, but what are the rest of you changing out at, and what type of plug?

[Mega Dogmeat]

I put a set of Bosch +4's in my silverado, and wound up replacing them with some NGK TR55 copper core plugs...

 

The +4's, I started to get really crappy fuel economy, and when I pulled one, it was black ...

 

I dunno what the deal was, but the NGK's have worked really well for the last 20k miles or os.

[Black02Silverado]

I will probably stick with the original plugs when the time comes to change mine out. If those are the original ones in your truck now, I think that they have shown you that they are worth replacing with the same ones. If they lasted and served you well with no complaints then why change? Unless you just want to.

[tmf6902]

I swapped mine out at 30K....the factory plugs were NASTY when I did. I changed them with Autolite plain old copper plugs. Runs well, and my MPG went up from the nasty factory plugs.

 

forgot to add that 3 of the plugs were gapped wrong.

[GnatGoSplat]

I replaced mine at just over 100k with the same as originals (expensive).

 

The old plugs actually looked pretty good. I even checked the gaps and there was no erosion, although one of the tiny platinum discs came off the side electrode when I checked the gaps. I guess that plug was weak, so I'm glad I changed them.

[Bish]

I changed mine at 30K, 60K, and 90K. I went with NGK TR-55 straight copper plug. Smoothed out the idle. Also had 2 platinum disks fall off the OEM plugs. Only benefit to platinum is longevity. I run copper and change every 30K. Not sure how easily plugs would come out of an aluminum head after 100K.

[MichaelL]

I changed mine at 30K, 60K, and 90K. I went with NGK TR-55 straight copper plug. Smoothed out the idle. Also had 2 platinum disks fall off the OEM plugs. Only benefit to platinum is longevity. I run copper and change every 30K. Not sure how easily plugs would come out of an aluminum head after 100K.

me either.........right now the boots are on pretty good.

the engine has run so well over the last 3 years, i elected not to fool with anything.

what special task is it to get the boots loose?

[elboberino]

I changed my plugs at 30k also to copper core plugs. I haven't changed them again since I have only gone 10,000 miles since the install.