2015 Lexus GS 350 with 78,300 miles.
I purchased this car a few weeks ago, and today I changed the spark plugs. One plug has oil, please see photos attached. I think the oil is only on the tip. The spark plug is on the passenger rear side of the engine. The car is running good, no check engine light. The other 5 plugs were original and worn out, but dry. Any idea what could be the problem and how can it be repaired? Is this a very bad issue and could be expensive to fix? Thanks for your help.

 

That spark plug looks perfect and has at least another 100,000 miles minimum remaining.

 

i changed my plugs at 60000 miles, a couple of them looked similar to yours. so far i havent come up with anything significant. if youre not getting any codes or having performance issues i wouldnt be concerned. if youre paranoid you could always get a thorough UOA done from a lab with iso certification (NOT blackstone) and see what comes up.

 

I changed mines at 60k and mines look like urs too, mybe that's why they recommend 60k to change the plug?

 

They're not expensive nor hard to change, I do mine as required every 60000 miles. That said I don't see any problem with that, it's just a normal used plug.

 

If that's how your plugs look after 78k you don't need to change your next ones until you see 300k!

 

 

Thank you sickpuppy for posting the information regarding the use of anti seize compound on spark plugs (REPLY #4).
If the plug is metal, it is recommended not to use anti-seize on the threads. Anti-seize compound is only recommended for use on "black treaded " non metallic plugs.
The nickel coating on most modern spark plugs provides added protection from seizing in aluminum cylinder heads and has made anti-seize less important in spark plug installations. Anti-seize can alter the tightening torque up to 20%, increasing the risk of breakage. It can also create heat transfer and electrical conductivity concerns.

 

Change the PCV valvle, and do a Upper Intake induction cleaning. Completes the whole combustion chamber effeciency burn cycle.

 

@ELexis I think you're posting in the wrong topic. There is none with the username "sickpuppy" in this topic.

Perhaps this the topic you meant to post it: https://www.clublexus.com/forums/is-...g-threads.html

This topic that you posted in is from 2019. The one that I linked above is from 2016, so I would be cautious of the dates before you post. I wouldn't post in something that old unless you really have something valuable to add/correct.

~ im2bz2p345