Absolute BEST spark plugs out there?

[KDOG]

Well its about that time I'm almost at 60K, so I'm gonna go ahead and do this before I go on vacation in April. I recently purchased a camper so I want to squeeze every little bit of power and efficiency out of my beast. I've heard positive things about Bosch Platinum +4s' - like they put out the best "bang" - to negative like they're junk and the tips break off into the cylinder. I've heard of Iridiums, but don't know much about them.


So I'll ask all you car peeps, what would be your choice for spark plugs? Cost isn't an issue since its only done once every great while. As far as the other stuff I use, I use Mobil 1 full synthetic oil and K&N air and oil filters.

Also do changing to high end spark-plug wires make any difference? Thanks for any help you can give me...

 

[iamwiz82]

Just cheapie Champions are fine for the 4.0.

 

[heymrdj]

Don't use Bosch, their crap. i recommend Champion and Motocraft.

 

[SAWYER]

jeepsunmlimited.com or jeepforums.com have very informative message boards

 

[KDOG]

Originally posted by: Sawyer
jeepsunmlimited.com or jeepforums.com have very informative message boards

Yes, thanks. I'm a member at jeepforums.com, I'm going to post over there too.

 

[Vette73]

You will not notice much of any difference with most plugs.

I would not get the Bosch4 as it covers up a lot of the spark area, more so then the cheapest copper plugs. If you must run them, then get the Bosch2.

But Plat plugs actually offer less performance then copper plugs. The reason for Plat (and other rare metals) is life span. I run Champion Truck plugs in my truck. Its basicly a regular copper plug with a bigger head.


So if they are easy to get to and you like working on your car then get some copper plugs and change every 30k. If its hard to get to and/or you don;t want to mess with it then get some decent Plat. plugs.

 

[crab]

I use NGK V-Power plugs in my van with the best luck.

 

[Elstupido]

Whatever the manufacturer recommends. I have tried all kinds of after market plugs, and it seems the factory ones are always the best.

 

[Bignate603]

The 4.0 liter isn't a picky engine, it will do just fine with the normal plugs.

 

[LTC8K6]

Use the ones listed on the emissions control label under the hood.

 

[LTC8K6]

http://www.wjjeeps.com/service/sparkplugs.htm

 

[boomerang]

The spark that jumps the gap in a cheap spark plug is the same spark that jumps the gap in an expensive spark plug. A spark is a spark.

As far as spark plug wires go, electrons don't care how much the wire that carries them costs. They'll travel on the cheap wire as well as on the expensive wire.

Isn't the spark plug change interval universally standard at 100,000 miles now? Do your spark plugs really need to be changed?

 

[0roo0roo]

just change them anyways...
as said, i doubt it matters for regular cars. but fouled/worn down or whatever plugs suck worse than even the cheapest new ones.

 

[KDOG]

Originally posted by: LTC8K6
http://www.wjjeeps.com/service/sparkplugs.htm

:thumbsup: Good stuff, thanks!

 

[angry hampster]

Get copper plugs from NGK or Champion. There's no reason to pay more for anything else.



edit: I can't remember the last time I checked or changed the plugs in my 4.0 Jeep. Damn engine cannot be bothered by anything.

 

[Bignate603]

Originally posted by: angry hampster
Get copper plugs from NGK or Champion. There's no reason to pay more for anything else.



edit: I can't remember the last time I checked or changed the plugs in my 4.0 Jeep. Damn engine cannot be bothered by anything.

True, during a discussion on the best oil for the 4.0 somebody commented that it would run on water and corn starch. It's an older design and it's pretty hard to screw up.

 

[JulesMaximus]

New ones.

And, assuming none of your plugs are fouled or wires arcing, you aren't going to notice any difference no matter which plugs you choose.

 

[Pacfanweb]

Autolites, or NGK's

There is not a plug made that makes a "hotter spark". All a plug is, is a path for electricity from the coil to flow. The plug gap determines the voltage, the coil's windings determine the amperage.

All the plug does is keep the compression in and allow the electricity to jump that gap and start the fire. All the "platinum/irridium/flux capacitor" crap they're made of does is make the gap increase slower...so the plugs last longer.

But Autolites and NGK's are ones that I've had people who test these things constantly say that tend to be "right" out of the box, and fail less than other brands.

As far as the plug wires go, if the resistance is the same, it doesn't matter what you pay...initially. But "better" wires DO last longer than the cheap ones. Cheap wires are notorious for not lasting.