Best Spark Plug for P5

[avhed]

I see a lot of people on this forum using the Iridium plugs.Can I assume this is
better than the Bosch Platinum +2 or +4.Its hard to see how a smaller electrode make that much difference.

[dsr70]

I see a lot of people on this forum using the Iridium plugs.Can I assume this is better than the Bosch Platinum +2 or +4.Its hard to see how a smaller electrode make that much difference.

I use Autolite Double Platinums. This because coming from a Miata, where the plugs fire twice as often, I wanted max life. They have been very good in my use, with virtually no gap wear in about 27k on the Miata.

That said, I prefer the design of the Bosch +2's, where the spark is more exposed to the chamber due to the ground being off to the side. That's an intuitive belief, I've read nothing about superior performance, and have read complaints about the Bosch plugs in general.

But in reality, the difference in performance is so minimal in our conventional applications that it's not worth arguing. Longevity and cost are the only variables of interest IMO. I'm sure Champion Double Platinums are just as good.

Doug

[mokeOne]

i'm using bosch 4's and they're doing a great job. also put some magnecor wires on there, just because.

[Aricjm15]

OEM

[Action Jackson]

NGK V-Groove.

[RaiderMP5]

There are a few topics about plugs. Many of us have had bad problems with the bosch platinums, myself included. They turned to be total shit, even though they are great in vw's.

I recommend NGK's. They came withthe car, and work well.

[pass the peas]

By no means an expert, I have never looked for performance gains from spark plugs. I have never seen any reason to upgrade a standard plug to a platinum plug and never owned a vehicle that came with platinum plugs from the factory. I'd rather take them out every year and spend the ca. $10 and know what's in there and know that my threads aren't seized up. That said, I prefer ND plugs to NGK, but I think they're probably equal in performance.

[Protephile]

NGK. No reason to use anything else that costs more, IMO.

[dsr70]

NGK. No reason to use anything else that costs more, IMO.

Probably true in the P5. But in the Miata, the plugs fire in a series pair, with one of the plugs firing in reverse. Meaning, it fires from ground to electrode. Since wear takes place from the point where the spark emanates, a platinum ground is useful.

Doug

[outlaw_mp5]

anyone knows about this spark plug? I heard its suppose to be one of the best

[SciFiMan]

That's a new one to me, and an interesting design, but if it sparks it will probably work in a stock or lightly mod'ed car. You can try it and just check them every 1000 miles to make sure they're not fouling, etc. Spark plugs are trendy now, and like fishing tackle, most are designed to catch more wallets than fish. Unless you need a hotter or colder plug than stock you aren't likely to notice any difference. I ran Bosch Platinum 2's for 30K and they looked and ran great when I pulled them. Now I just have cheap copper Autolite's at the moment but I'll be changing them at about 10K miles of life.


anyone knows about this spark plug? I heard its suppose to be one of the best

[SkinnyJoint]

N G K -for life ninjas