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Old 11-24-2005, 10:57 AM   #1
Vertigoomg
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Default Wtf

What is the difference between NGK plugs, Champion plugs, Bosch Super (non-platinum) plugs, Autolite plugs, ect. Is it such a big deal to use something other than NGK? I can get autolites for 1.29 vs 1.59 or 1.99 for NGK's.

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Old 11-24-2005, 01:40 PM   #2
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Default Re: Wtf

If you go to autolite.com and find out what ordinary copper plug they recommend it's probably pretty good.

For my SOHC, I think that's a 3926.

Walmart sells only the 3924 which is a cooler heat range. IIRC it's a (more) direct fit for the twin cam. Walmart's little computer says 3924 of course because they want to sell you a plug. It'll fit, and work, but might gunk up if you do a lot of short trip driving.

Even if you shop at a real auto parts store, if they have a small inventory, they will give you a plug that's not quite right.

NGKs are stock for many of the years, and to many people the $9 for a complete home tune-up is not an imposition. If you put in a $5 set of autolites and you get a slight stumble or .1 drop in MPG, you might find yourself wondering if the NGKs would have been better. It might not be the spark plug's fault of course, but if you're the type who wants perfection, that nagging feeling will eat at you.

You might see if Luke chimes in, he swaps his plugs every 5000 miles or so and has 430,000 miles on his car. If you like swapping more than every 30,000 miles as recommended cheap plugs might make sense. Even if the old plugs are properly gapped new plugs have those nice sharp corners to the electrodes. And if you burn lots of oil and foul plugs cheapies have their place.

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Old 11-24-2005, 01:48 PM   #3
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Default Re: Wtf

Quote:
Originally Posted by Vertigoomg
What is the difference between NGK plugs, Champion plugs, Bosch Super (non-platinum) plugs, Autolite plugs, ect. Is it such a big deal to use something other than NGK? I can get autolites for 1.29 vs 1.59 or 1.99 for NGK's.
Is 70 cents really that big of a deal every 30K??? When all you look for is the cheapest part, that's what you end up with. You get what you pay for.

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Old 11-24-2005, 02:55 PM   #4
LowSC2
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Default Re: Wtf

Get the NGK's. Worth the extra $0.70 a plug...

...
Jeff Silva ~ 91 SL2 - 11.809 @ 116.488mph
•Chilton & Haynes manuals are junk
•Changing the ECTS doesn't fix everything

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Old 11-24-2005, 11:01 PM   #5
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Default Re: Wtf

The question, however, is what makes them different. The NGK's for 2 bucks are the standard plugs... not v-powers. All of them look the same, feel the same, and (AFAIK) act the same. Even if it's to save .70 of a buck per plug, I'd rather do that than spend .70 of a buck for nothing.

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