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10-19-2013, 03:50 PM | #1 |
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Any better spark plugs than stock?
Just curious....is anything out there superior to stock for the S65?
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10-19-2013, 05:15 PM | #2 |
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Not that I'm aware. They are a lot cheaper for the same NGK model on Amazon.
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10-19-2013, 10:12 PM | #3 |
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changing them often is the only thing worth doing. Even after 10k miles they start to cause timing to be pulled by messing with the ion sensing ability of the spark plug electrodes mimicking knock by giving a signal interference between dirty electrodes. So keep changing them every 10k and have performance like new and full timing advance
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10-19-2013, 10:55 PM | #4 | |
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If there were a Denso Iridium that fit, I would recommend that as you can get an ultra-sharp 0.4mm tip -- sharpest made.
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10-20-2013, 10:58 AM | #5 | |
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10-20-2013, 12:16 PM | #6 |
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10-20-2013, 12:41 PM | #7 |
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No, you won't, they do not exist.
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10-20-2013, 04:05 PM | #8 |
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I believe it is at 37k, then every 60k after that. I'd say that's probably a bit too long given that these are not a quad-electrode plug. I would recommend a 30k interval, unless the bulk of your driving is highway.
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10-20-2013, 06:55 PM | #9 |
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10-20-2013, 08:00 PM | #10 | |
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Jesus Christ are those expensive. It's stupid to use iridium if you're not going to run a very long change interval, so I'd pass on them unless you plan to leave them in for 75k+. Odd that those part numbers do not come up on the NGK website. The LKAR8AI-9 plug has a totally different design from stock and is only a single electrode.
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10-20-2013, 08:33 PM | #11 |
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why iridium over the normal ones that stock uses if you change interval is 15k?
I have tried have verified that timing on this car is pulled after 15k or so with plugs. New plugs and immedatly car was able to hit timing targets. Have done this multiple times. Plus if bmw recommends a change at 36 , than why would the next one be 60k? makes no sense. 36 still too long but 60 is just ridiculous. There is no "need" to do it anymore often than every 50-75 as the car will run but its a matter of do you want your car running at peak power and efficiency. Some of us are anal. 15hp is a big deal to me to be wasted which is what you will likely give up if you wait until 50k miles. Some gas mileage as well. To me its worth it to keep the car in absolutely peak shape |
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10-20-2013, 09:35 PM | #12 | |
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60k is not ridiculous. Compared to most other vehicles, it's actually rather short. Every other car I've had (two Audis, two Hondas, Mazdas, etc) came with factory multi-electrode platinums that were good to 100k. The newer cars are moving to iridium with change intervals of 150-200k. Changing them early won't hurt anything, but why throw money down the drain. It's placebo effect.
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10-21-2013, 08:31 AM | #13 | |
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http://www.amazon.com/NGK-LKAR8AI-9-...ords=LKAR8AI-9 Aside from the pre-gap, they should work, although they look quite different from the photos. Damn expensive too.
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10-21-2013, 08:33 AM | #14 | |
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