Spark plugs whats best - Ford Mustang Forum
 
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post #1 of 10 (permalink) Old 03-05-2016 Thread Starter
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Spark plugs whats best

Hi all

A few questions. First, when should the plugs be changed on a 2012 gt mustang?
What kind of plug should I change them with?
Wondering if an after market plug is better than the originals.

thanks

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post #2 of 10 (permalink) Old 03-05-2016
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OEM is fine and there is no need to change them. You won't get anything out of plugs unless you are FI or nitrous, where they are actually needed.

If they are getting tired, NGK stock heat range is great.


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post #3 of 10 (permalink) Old 03-06-2016
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I would stick to the oem plugs. If I didn't have nitrous I would still be on the stock plugs.
How many miles on your car?
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post #4 of 10 (permalink) Old 03-06-2016
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Change them according to the maintenance schedule for you car. I don't know without looking myself but it might be 50k, 60K, 75K, or 100K.

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post #5 of 10 (permalink) Old 03-06-2016
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How many miles/km do you have on your car? I think the maintenance schedule calls for 100,000 miles on the OEM plugs.

Are you noticing any issues with the way your car is running? If you're not anywhere close to the scheduled changeout and the car runs fine then just leave them alone. You won't gain anything on a factory engine.
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post #6 of 10 (permalink) Old 03-09-2016 Thread Starter
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I have 40 000 kilometers on the car
24 000miles
The car runs good
guess I'm leaving them in
but ive heard of leaving them in for a long time then the plug snaps when you try to turn it out

GO BIG OR GO HOME
5.0 coyote
BBK cold air intake
SCT tuner with 91 tune
roush axle back
Go BILLS

91 tune
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post #7 of 10 (permalink) Old 03-09-2016
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Quote:
Originally Posted by 2012bigredstang View Post
I have 40 000 kilometers on the car
24 000miles
The car runs good
guess I'm leaving them in
but ive heard of leaving them in for a long time then the plug snaps when you try to turn it out
The plug shaping issue is only on the 2005 to early 2007 Mustangs because they are two piece plugs. Your 2012 is good to go and unless there is a issue if I recall from my old 2011's service manual it is 100K miles is when it is called for. I don't blame you for wanting to do them before that, but I wouldn't do them before at least 50-60K miles.

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post #8 of 10 (permalink) Old 03-09-2016 Thread Starter
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thanks for the info
ill change around 70 000 kms not miles ehhhh

GO BIG OR GO HOME
5.0 coyote
BBK cold air intake
SCT tuner with 91 tune
roush axle back
Go BILLS

91 tune
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post #9 of 10 (permalink) Old 03-09-2016
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+1. That's the old two piece design that snapped. For my 05 expedition, I changed the stockers at 100k. Drove fine before and felt no difference after. And talk about sweating as I was changing them out but none broke.
But stick to oem and stock gap. Unless you go With a power adder.
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post #10 of 10 (permalink) Old 03-10-2016 Thread Starter
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thanks

GO BIG OR GO HOME
5.0 coyote
BBK cold air intake
SCT tuner with 91 tune
roush axle back
Go BILLS

91 tune
2012bigredstang is offline  
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