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Tractor Talk Discussion Forum

OT- Premium sparkplugs

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gcs

07-10-2005 09:37:39




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Time to change plugs in the truck, Dodge, 318 motor
What do you all think about the "Premium" plugs?
You know, the Platinum Bosch's, etc.
Has anyone noticed a much improved performance, or in gas milage? and if they do provide an advantage, will they do it with stock wires?
I know a dealer would just replace with stock Champions, and would never recommend anything else, and the truck would run fine.
So what is your experiance and suggestions?
Thanks.

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MarkB_MI

07-11-2005 03:30:32




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 Re: OT- Premium sparkplugs in reply to gcs, 07-10-2005 09:37:39  
They only spark plug failure I've ever experienced was a "premium" Bosch platinum plug. My pickup started missing about 5K miles after I installed the Bosch plugs. Pulled the plugs and found that the center electrode of one had drifted out of the insulator until it shorted out against the outer electrode. This was about 15 years ago. Maybe they've done something about their lousy quality since then, but I haven't given Bosch a second chance.

Anyway, a year or so later I'm sitting in the bleachers at a race and Bosch logos are all over the place. I comment to my friend about my experience with Bosch plugs, and the guy in the seat in front of me turns around and says "I had the same thing happen!".

Now the OEM AC platinum plugs that GM puts in pretty much everything now are truly a 100K mile plug. Why anyone would replace them with anything else is a mystery to me.

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Mark - IN.

07-10-2005 19:06:09




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 Re: OT- Premium sparkplugs in reply to gcs, 07-10-2005 09:37:39  
Never used them personally, but hear are expensive, don't clean them or lose the platinum coating, which is or isn't the greatest thing in the world. Have heard that performance isn't improved, but then again, never used them myself, heard from my brother whom gave them a shot.

Got an old tractor or engine where plugs are getting hard to find? Or just want to save some money over a period of time? If got a compressor, get yourself and extra set or two, and a sparkplug cleaner to sand blast the plug electrode, cathode, and porcelain (basically all that mounts into the head). Can typically get at least two good cleanings and re-gaps out of a set from a reasonably normal operating engine. Also, Black and Decker used to make a 12VDC version that worked pretty well too, if can find one.

Mark

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Mark - IN.

07-10-2005 19:20:12




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 Something else you can do in reply to Mark - IN., 07-10-2005 19:06:09  
Can take a marker (Sharpie) and draw a line down the lengths of their outside porcelain on the opposite side of the gap. If have extra plugs, run them in and snug them so that when are looking at the line you drew, the gap will be facing the piston dome, or close to it as posible. That way the spark will be the least impeded as possible when firing at the fuel mixture. Is a little extreme, but when are searching for HP, every tiny bit adds up. If your plugs use washers, can get extras from many auto parts stores that carry "Dorman" products for about 10 cents a piece. Get a dozen or so. Keep changing them out until find the one that lines up, and just because won't make that plug line up, doesn't mean won't make the next line up, so don't throw them away. Same with tapered/washerless plugs, if doesn't line up in one cylinder, try it in the next, next, next...

Mark

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Easy

07-10-2005 18:32:11




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 Re: OT- Premium sparkplugs in reply to gcs, 07-10-2005 09:37:39  
I believe that they are for extended use. Cadillac uses them on the Northstar engine, and advertises 100,000 miles between tune ups. Easy.



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Nolan

07-10-2005 16:43:57




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 Re: OT- Premium sparkplugs in reply to gcs, 07-10-2005 09:37:39  
Dyno tests of the various plugs that I"ve seen generally showed best results with NGK u-grove plugs.



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tlak

07-10-2005 14:59:37




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 Re: OT- Premium sparkplugs in reply to gcs, 07-10-2005 09:37:39  
Most of the referrals are for Bosch. A local parts store here wont even carry them because they're garbage. So you really don't have an answer. I think they're probably good for extended use and not really improved performance.



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Leland

07-10-2005 11:26:26




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 Re: OT- Premium sparkplugs in reply to gcs, 07-10-2005 09:37:39  
I have to agree with JT and Russel waste of money wife had a newer car and I put a set of these bosch's in and it ran like crap car was under warranty still and the first thing they did was dump the bosch's and the car smoothed out on plain and simple AC plugs.



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RusselAZ

07-10-2005 10:34:00




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 Re: OT- Premium sparkplugs in reply to gcs, 07-10-2005 09:37:39  
Don't waste your money. The 1.19 champions and autolites and delco will do just fine.

Platinum plugs are for engines and ignitions that were designed for them. And, I have thrown out a lot of almost new Bosch platinum plugs to correct diveability misfires.

Side note: At the moment I have a 98 honda CRV in the shop with three expensive fuel saver things on it. A K-N air filter, a vapor inhancer in the fuel line (fuel injected) and a Tornado thing in the air intake. None of which corrected the plugged injector. :)

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JT

07-10-2005 10:23:12




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 Re: OT- Premium sparkplugs in reply to gcs, 07-10-2005 09:37:39  
I put a set of Bosch Platinum plugs in a truck I used to have, was a 302 Ford, did not notice any differance at all, put them with some "good" plug wires, nothing I would brag about. Now, I don't worry about it, diesel engines don't use 'em.



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Nebraska Cowman

07-10-2005 10:16:03




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 Re: OT- Premium sparkplugs in reply to gcs, 07-10-2005 09:37:39  
In the old days there was a grocer here in Wellfleet that sold lamp oil, regular and hi-test. He pumped both out of the same barrell. He said you have to keep the customer happy. "some want price and some want quality"



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