brayson

How do these plugs look? What does it indicate about how my engine is running? I have an 05 GT with 40k. My car has been tuned. Any help would be appreciated.
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Chopper

I can't tell for sure from the pictures but they look a little worn.The mixture is probably OK.

ponyponer

yeah it's hard to say from the picture they always distort the perception. i had the original plugs in my 93 5.0 at 48k, and changed them out. they looked not much worn than those. i thought these newer cars like the 05s can go for 100k until the first scheduled tune up. the plugs in my 03 mach 1 have about 60k, and they look clean as a whistle, but they are aftermarket.

brayson

I appreciate your comments, guys. I'm glad that you think they don't look like things are runnning to hot or rich.
Yeah, they are platinums, so theoretically 100k is the scheduled maintenance on them. I only pulled them because people have problems getting plugs out with the 3v engines.
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pallidamors

I do the plugs about every 40k on my cars, just because its easier to get them out lol...plus whats a few bucks in plug? Remember, maintenance is much cheaper than repairs

lewistk

too true!
They dont look that bad, but i would advise changing every 50k... thats just me tho