Best Spark Plug

Igors92 · Apr 20, 2007

I've got a 03 GT and I would like to replace the factory plugs but I'm not sure what plug would be the best one to replace it with. With so many choices out there I would just like some opinions as to the best plug for everyday driving.

Kilgore Trout · Apr 20, 2007

Motorcraft AGSF-32C gapped @ .054

CobraRed_96_GT · Apr 20, 2007

Kilgore Trout said:
Motorcraft AGSF-32C gapped @ .054

he speaks the truth. FYI an AWSF will be recomended as a stock replacement, but the AGSF has longer threads to help prevent spark plug blow out (of the head)

rookie · Apr 20, 2007

CobraRed_96_GT said:
he speaks the truth. FYI an AWSF will be recomended as a stock replacement, but the AGSF has longer threads to help prevent spark plug blow out (of the head)

CobraRed,

Would you recommend the same based on the minor mods I have (mentioned on the thread I started for a recommend. on a turbo)?

DBMSTNG · Apr 20, 2007

rookie said:
CobraRed,

Would you recommend the same based on the minor mods I have (mentioned on the thread I started for a recommend. on a turbo)?

with minor mods, use the same plugs. with a turbo, you want 2 steps colder.

99MustangGTman · Apr 20, 2007

NGK TR6 gapped @ .035, cheap and works great

four six · Apr 20, 2007

autolights

CobraRed_96_GT · Apr 20, 2007

rookie said:
CobraRed,

Would you recommend the same based on the minor mods I have (mentioned on the thread I started for a recommend. on a turbo)?

yes, as stated before you will need to go 2 steps cooler with a blown engine, turbo or S/C. Also you will need to have a smaller gap to prevent spark blow out (boost blowing out the spark leaving unburnt fuel and carbon). So I guess i'd say an AGSF-12C at .028-.033

40th GT · Apr 20, 2007

I have the original AWSF-32PM (platinum version of the Motorcraft plugs) and they've been great. I'm sure the copper version will perform better, but so far these OEM Motorcraft plugs are good.

http://www.bullittarchive.com/WebHelp/Mustang_Maintenance/Spark_Plug_Change.htm
This article lists the different types of plugs from Motorcraft.

01Steeda · Apr 20, 2007

sorry, thought this was the thread about the blown motor. disregard

Mustang225 · Apr 21, 2007

Any concerns when changing the plugs (ie:location of plugs)?

Kilgore Trout · Apr 21, 2007

Mustang225 said:
Any concerns when changing the plugs (ie:location of plugs)?

There are many concerns when changing plugs and many little tricks to make the job better. I have posted them too many times to do so again...

281CI96Coupe · Apr 21, 2007

is this only for new edges or this is exactly for sn95's too?

RandyStinchcomb · Apr 21, 2007

CobraRed_96_GT said:
So I guess i'd say an AGSF-12C at .028-.033

Correction: there is NO such Sparkplug # in Motorcraft as a AGSF-12C, now there is a AWSFA-12C which is 2 steps colder but is ONLY aval in a 1/2 thread (AW) design and since this plug was originally designed for the 1996 to 1998 3.0 "Flex Fuel" Taurus, I doubt if FoMoCo will ever make it a full thread design "AG" series

Shiroelex · Apr 21, 2007

four six said:
autolights

Motorcraft plugs are Autolites!

RandyStinchcomb said:
Correction: there is NO such Sparkplug # in Motorcraft as a AGSF-12C, now there is a AWSFA-12C which is 2 steps colder but is ONLY aval in a 1/2 thread (AW) design and since this plug was originally designed for the 1996 to 1998 3.0 "Flex Fuel" Taurus, I doubt if FoMoCo will ever make it a full thread design "AG" series

That explains alot... Do you think I could find an Autolite alternative for full length thread 12C's, or are we stuck with NGK?

four six · Apr 21, 2007

Shiroelex said:
Motorcraft plugs are Autolites!

I know.

Shiroelex · Apr 21, 2007

four six said:
I know.

Heh, sorry. I just like pointing that out, because Motorcrafts are sometimes cheaper than Autolites, and it's a good bargain for sweet plugs. Motorcraft oil filters are actually Purolators, and they are one of Purolator's nicer designs. The Motorcraft filters are actually way cheaper than what Purolator charges for them.

thomas91169 · Apr 21, 2007

99MustangGTman said:
NGK TR6 gapped @ .035, cheap and works great

+1

CobraRed_96_GT · Apr 21, 2007

RandyStinchcomb said:
Correction: there is NO such Sparkplug # in Motorcraft as a AGSF-12C, now there is a AWSFA-12C which is 2 steps colder but is ONLY aval in a 1/2 thread (AW) design and since this plug was originally designed for the 1996 to 1998 3.0 "Flex Fuel" Taurus, I doubt if FoMoCo will ever make it a full thread design "AG" series

Yeah, i didn't look up the part, i was speculating - my bad.

281CI96Coupe said:
is this only for new edges or this is exactly for sn95's too?

I use AGSF-32C's, this is a good spark plug for either models

Best Spark Plug

Igors92

Member

Kilgore Trout

Fried or Broiled ?

CobraRed_96_GT

Active Member

rookie

New Member

DBMSTNG

I fantasize about it being BIG!

99MustangGTman

New Member

four six

Member

CobraRed_96_GT

Active Member

40th GT

New Member

01Steeda

New Member

Mustang225

Kilgore Trout

Fried or Broiled ?

281CI96Coupe

Member

RandyStinchcomb

New Member

Shiroelex

There's nothing worse than aut

four six

Member

Shiroelex

There's nothing worse than aut

thomas91169

I'd donkey punch my sister.

CobraRed_96_GT

Active Member

Similar threads

Best Spark Plug

Member

Fried or Broiled ?

Active Member

New Member

I fantasize about it being BIG!

New Member

Member

Active Member

New Member

New Member

Fried or Broiled ?

Member

New Member

There's nothing worse than aut

Member

There's nothing worse than aut

I'd donkey punch my sister.

Active Member

Similar threads

Privacy & Transparency

Privacy & Transparency