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Old 03-05-2020, 04:46 PM   #1
thatgarrett
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Default EJ253 2007- these spark plugs look ok?

Chasing down a mild hesitation issue and poor-ish fuel economy (21-22 MPG for 5MT) and pulled spark plugs, the PO changed them 24K ago with NGK and also the wires with the blue NGK ones, there was a tiny bit of oil around the threads near the engine side of the plug, but less than a drop probably. I havenít changed them yet, I was messing around with something else and figured Iíd pull it and check it. It looks a little dirty but not too bad, but I havenít dealt with plugs a lot (most of my old cars had iridium plugs in them)

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Old 03-11-2020, 06:44 PM   #2
aaronnichols
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Mine look the same, i have ej253 in my 05 impreza RS
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Old 03-12-2020, 01:23 PM   #3
yarrgh
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What did the gap measure?
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Old 03-13-2020, 05:26 PM   #4
dmont
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That plug looks normal to me. No excess carbon, no wet oil. Looking good as long as the gap is OK.
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Old 03-13-2020, 11:26 PM   #5
Jersey Man10
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Yeah mine looked about the same after 40k miles.
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Old 03-23-2020, 08:48 PM   #6
thatgarrett
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Yeah thatís what I figured too, the little bit of oil on the threads makes me think the valve covers are going soon, but those should have been replaced 20k ago when the head gaskets were done...
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Old 03-23-2020, 08:59 PM   #7
2slofouru
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If that's mostly city mpg, that is great. The plug looks good as well. Not sure what that tiny chunk sitting on the right side of the washer is, maybe some debris from taking it out.
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Old 03-23-2020, 09:09 PM   #8
thatgarrett
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Quote:
Originally Posted by 2slofouru View Post
If that's mostly city mpg, that is great. The plug looks good as well. Not sure what that tiny chunk sitting on the right side of the washer is, maybe some debris from taking it out.
Yes that is city, I guess I had slightly higher expectations having 6 cylinder cars before this but with AWD that makes sense.
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Old 03-24-2020, 12:11 PM   #9
kos
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That's pretty solid on the MPG, just double check the gap, and you should be good to go.
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Old 03-24-2020, 08:21 PM   #10
2slofouru
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Quote:
Originally Posted by thatgarrett View Post
Yes that is city, I guess I had slightly higher expectations having 6 cylinder cars before this but with AWD that makes sense.
I have an 07 sedan manual, and you get better city mpg than I do. Of course I may drive mine harder. Mine is in excellent running condition and only gets 18-20 city, yours is great comparatively.
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Old 03-25-2020, 08:21 AM   #11
thatgarrett
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Quote:
Originally Posted by 2slofouru View Post
I have an 07 sedan manual, and you get better city mpg than I do. Of course I may drive mine harder. Mine is in excellent running condition and only gets 18-20 city, yours is great comparatively.
Thatís good to know, mines a wagon and I let it warm up, but usually drive it fairly hard too. I donít have the longest commute so for the last few miles once everythingís warmed up Iíll try to get a decent pull every few days.

It runs a lot better than my old legacy did though, a 2003 with a 5MT. On the highway, Iíve only gotten about 25-26mpg on road trips which was a little lower, but keeping it at higher speeds probably was the cause of that. Glad to hear thatís par for the course!
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