Toyota 0w20, 6644 miles, 2006 Civic

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A few months after I bought the car last summer I changed the spark plugs and the original ones all looked in great shape, no signs of running rich at all.
 
This is an interesting UOA. It's definitely something to keep an eye on. I would re-sample around 3k miles.
 
Originally Posted By: buster
This is an interesting UOA. It's definitely something to keep an eye on. I would re-sample around 3k miles.


It's something I've been considering over the past few days, whether I should run a much shorter interval this time around to double check things. I'm not sure I could run it as short as 3k, but perhaps 5k. Even with the amount of fuel in this run, it certainly doesn't seem to have hurt the engine, so if I do end up going just as long on this run I am probably still ok.
 
I dont think Buster meant change the oil at 3k, just sample and see how its holding up.
 
Originally Posted By: k24a4
I dont think Buster meant change the oil at 3k, just sample and see how its holding up.


I do realize that, but for me if I'm going to sample it I might as well change it since I don't have a fumoto valve or an extractor, so once I open up that drain plug, the oil might as well be changed.
 
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