Hibiscus Red S4

What type should I apply to spark plugs? Nickel, Marine Grade, Copper Based?

The brand I'm looking at is Loctite
Protects metal parts from seizing and galling to 2400 F

Thanks.

TwinTurboTerror

I really don't think it's necessary.

S42002

I used some fresh synthetic oil on the threads... figured if I applied too much it would just burn or ash off.... just checked two of my plugs after 35000 miles, still had some oil on the threads so that's what I will use in the future also.

Oo.et.oO

put copper based cheapo stuff on mine last night. no misfires yet.

S4_Cinci (I S'edTFA)

unless you have a major problem, and then the plugs are the least of your worries. I have used anti-seize (nickel based) on spark plugs on 8 different vehicles over the past 10 yrs or so and have never had a CEL on any of them due to the anti-seize. As long as you don't goop on large chunks of the stuff you will be OK. Is it really necessary? Not if you change your plugs every 20 - 30k, but my attitude is why risk it with Aluminum heads. Just a thin coat on the threads is all you need. I have checked and it does not reduce heat transfer (I posted on this a year ago or maybe longer) or conductivity (thus your ground for the plugs is not adversely affected - I checked this via resistance using a multimeter.

Many plugs come with phosphate coated threads, but I will continue to use AS on the plugs and dielectric grease on the insulator/connector boots. You don't have to use synthetic oil in these cars either, but I will never use dino oil in any car ever again. Just personal preference. The risk of damaging the threads in the head is not worth saving the extra buck or two that would be realized by skipping the AS and silicone grease, IMO.

Hibiscus Red S4

Great thanks, picked some up