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Old 03-07-2012, 07:09 PM   #1 (permalink)
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Default What are the best spark plugs for subarus?

I am aware that this will be another loaded question, but I have a 96 outback 2.5 auto and i have no idea when the plugs were last changed as i just purchased the vehicle, its got about 174000 miles on it and if they havent been changed it is past time to do it
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Old 03-07-2012, 07:29 PM   #2 (permalink)
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you want NGK plugs. i don't know the specific number off hand but they cost about $8 at the parts store.

the $2 plugs will work just fine but the $8 plugs last a lot longer.
they can be challenging to remove, especially #4.

do you have an owners manual.?
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Old 03-07-2012, 07:39 PM   #3 (permalink)
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Yea. Oem ngk.
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Old 03-07-2012, 08:03 PM   #4 (permalink)
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Yeah ... what they said - NGK.

I ran the $2-3 plugs in mine for awhile, then switched to the $10 ones ... did not notice any difference in performance, but they are just enough of a PITA to change out that I think the $10 ones are worth it. 60k miles vs 30k miles.
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Old 03-08-2012, 11:34 AM   #5 (permalink)
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so are you guys talking about the platinums or the iridiums?
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Old 03-08-2012, 11:36 AM   #6 (permalink)
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and surprisingly enough the owners manuals were in the glove box when i bought the car
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Old 03-08-2012, 11:46 AM   #7 (permalink)
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NGK Platinum is OEM, but I paid the extra dollar per plug for the Iridiums. I don't remember the number off the top of my head...you can find it at Napa, Pep Boys, Rock Auto, etc.

RobLog is spot on: changing the spark plugs are a pain. Took me a few hours the first time, but I could probably do it in about 45 minutes now. It's still one of those things that if you're going to do it, go all out....you're not going to want to do this very often lol. On my 06 2.5i, I found it helpful to remove the battery and the giant hose going out from the air filter housing (which I also removed). The front two plugs weren't too bad (tight, but doable), but the back ones sucked. I later figured out that I had to drop the socket down, follow it up with a wobble joint, then I could follow it up with my socket driver. If you need new wires, a new battery, or a new air filter, this is the time to do it. I was in need of new wires/air filter/battery, and I had to put them all back in anyways...figured it was best to put new ones back in.
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Old 03-08-2012, 12:08 PM   #8 (permalink)
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i have access to a lift and when i was under the car the last time i had clear access to all four plugs from below so i think thats the way i am gonna do it, fyi the iridium number is bkr5eix-11 or 5464 depending on how your part store stock their stuff
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Old 03-08-2012, 12:10 PM   #9 (permalink)
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Plus one for NGK iridium plugs. They seem to last longer.
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Old 03-08-2012, 12:12 PM   #10 (permalink)
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So you're going to cheat but putting on a lift. Lol jk...I've heard it's much easier that way. Glad you have access to a lift.

Yup...sounds like the part number. Have fun!
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225/55R17 BF Goodrich Advantage T/A on stock rims
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NGK Iridium Plugs
Everstart Maxx 35N Battery
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