Good evening,

Just looking for some opinions on the best spark plugs that you have used in your car or that you are currently using..

i know a sparkplug is a sparkplug at the end of the day and as long as it sparks thats kinda all that matters,

But these companies,
Bosch , Denso, NGK , Champion, MotorCraft
(i wont use champs again as they go rusty at the slightest hint of moisture)
have there range of cheap to expensive plugs

platinum, double platinum
super plus, super 4,
iridium, super iridium lol
single twin quad electrode etc...

then there's standard ford MotorCraft and MotorCraft platinum

each companies boasts about this and that,

and so on,

what is your preferred choice of plug.
or what do you know its the best plug to run on the zetec-e lump,

currently i am trying out the bosh super 4's and they dont seem to impress me they seem to have killed the pleasant powerband from 4k-6k,
but increased bottom end torque?
the super 4s seem to run abit colder as they come out a with carbon deposits on the base of the plug

my old set of NGK R's seem to be the best all round, they seem to run hotter than the boshs as they come out a little less tanned than the Bosch plugs

all opinions welcome

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buttery biscuit boost

hi m8 you see when this done could you post wot pepole thought were the best as i have heard a lot of desucion about sparky fuking up the power in pepole's car a lot of pepole have told me to go to ford motersport for them and to avoid boch. but other's say that boch are fine.

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i have some random plugs in mine, cant remember what brand for the life of me tho made my Si run like a sack of shit

i swapped over to motocraft platinum jobbies stuck with those pretty much, ran sweet as a nut after that

Bosch do the job for me normally.

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Rest in peace Ben "Jam" Elvin. Gone but never forgotten.

Always used Bosch's on the Si

NGK's for the Pulsar

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Quote Clarkson, Top Gear, 17th July: "I'm not having a stroke... just driving a Nissan!"
Quote Ry, Mallory Park, 3rd Dec: "Ahhhh crap... Just a bit too over eager really!"
"I used to be an adventurer like you, but then I took an arrow in the knee"

so it appears we have a mixed opinion
between NGK Bosch and Motorcraft.

If the next to posters say denso and champion then i guess no-one really knows what the best plug is lol,

if i had the time and money i'd rent a rolling road for a day and test several plug and gap combination lol.

I would like to think that the Motorcraft plugs were the best for the engine as i guess they might have been specified in the original engine blue prints lol, but everyone knows someone else can make a part for a ford better than original

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buttery biscuit boost

New Motorcraft plugs are made by NGK anyway.

I personally use Denso as i've got a supplier state side who stocks them at a very reasonable price, but anything iridium ftw

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Some people are like slinkies. Not really good for anything, but bring a smile to your face when pushed down the stairs!

From the moment I picked up your book until I laid it down, I was convulsed with laughter. Some day I intend reading it.

to be honest i think the plugs must differ on engines.
as pepole are getting good results from a brand of plugs when other's using the same plugs are getting bad results.

so i am going to give it trile and error basicly.

i will take all the brands listed and note them down then try each 1 over time and see wich work best for my engine.

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buttery biscuit boost

I had no end of trouble on my si (think it was my first one) with plugs
NGK's didnt help, bosch didn't help and Motocraft sorted it right out
so thats what I would go for.

My cupra melts bosch plugs, so I need colder grade iridium jobs, but thats not
needed on a N/A car.

Motocraft

Emlyn

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cant see how p[lugs would cause a problem when repalcing them unless they were faulty items they should all be fine i sued ngk platinums on mine were sound

All I know about it is I put brand new NGK's in and it ran like shit, then I put some
used Motocraft items in and it ran like a dream.

Plus, I did the gaps on all of them to make sure they were in.

Emlyn

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NGK triple platinum plugs are pretty good

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Denso iridium is good