Best spark plugs

[02 ranger]

the other day i checked one of my spark plugs and i noticed that they were greyish. I am a diesel expert and idk shit about gassers. lol. But i have read around here that motocraft plugs are best. The ones on my truck are autolites. I am going to change all 6 of em soon. What plugs are the best for my truck!?
2002 ford ranger 4.0l sohc

 

[Big Jim M]

Fore sure the Ford Motorcraft plugs are BEST! But some here think the Autolites are the same.. I'm not so sure and always go to the dealer and get the original plugs.
Grayesh is good! Modern engine spark plugs should last well over 100,000 miles. If your engine isn't missing under load the plugs and wires are GOOD! Why waste the money?
Big JIm

 

[84stealthranger]

what ever came stock in it i would get them.

 

[84stealthranger]

http://www.rockauto.com/catalog/raframecatalog.php?carcode=1385737&parttype=7212&partkey=1017149&a=FRc1385737k1017149-1067019
there is so many to choose from but stock is best from what ive heard too

 

[02 ranger]

Fore sure the Ford Motorcraft plugs are BEST! But some here think the Autolites are the same.. I'm not so sure and always go to the dealer and get the original plugs.
Grayesh is good! Modern engine spark plugs should last well over 100,000 miles. If your engine isn't missing under load the plugs and wires are GOOD! Why waste the money?
Big JIm

My friend that lives gas says that they look "fouled out". What does this mean lol

 

[02 ranger]

i see nickel, platinum and iridium. Which are the best. Pros and cons.

 

[Sasquatch_Ryda]

AGSF34FP is the part number for the correct Motorcraft Plugs for your truck.

 

[armidapoizon11]

I use Bosch platinums and I've never had a problem I guess it's drivers preference.

 

[Big Jim M]

plugs

i see nickel, platinum and iridium. Which are the best. Pros and cons.

The AGSF34FP is a double platinum plug and would be positively the best you could do.

"fouled out" would mean to me the plugs are wet and cruddy looking. This could occur from the plugs not fireing as they should.

Your engine was developed with the AGSF34FP plug and other brands TRY to copy that plug... some may get close and others try to share a plug with many other engines.

All a plug has to do, is make a spark at the proper time... The AGSF34FP does just that! Others may and then again may not! Why take a chance with the ones in the bright yellow or bright red box? When we know for sure the AGSF34FP will always fire when needed and will last for far over 100,000 miles?

Big JIm

 

[85_Ranger4x4]

Most of the time when you cross referance plugs, they cross over to a plug that will work. They may or may not be the same as OEM, but they will work.

Kind of a crapshoot really.

I run OEM in my F-150 and they work great IMO.