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Thread: The Duratec Sparkplug Sticky Reply to Thread
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Topic Review (Newest First)
11-06-2016 08:04 PM
notfortheweak okay.
I ask if they carry them on the shelves.
Ill try those next tune up
11-06-2016 11:38 AM
mac.mogul
Quote:
Originally Posted by notfortheweak View Post
Where do you purchase your AR103s?
Pretty sure you can still get them on Amazon.
Walmart carries them online.
Oreilly's can order them.
Etc.
11-05-2016 06:46 PM
notfortheweak
Quote:
Originally Posted by mac.mogul View Post
It is one step colder than the 104. There is zero chance that you will foul a plug and misfire because of the heat range. Your AZ Bro is talking out of his butt.

Now, if you went to something like an Autolite Racing AR92 plug, then you would have issues because that is 4 steps colder and should only be used on a forced induction application with appropriate tuning.

The Autolite 103s are fine for normal use on the Duratec 2.0. Gap them to 0.055 (some have gone to 0.060 with no issue) and you'll never have a problem. You'll see better MPG and smoother engine operation.

It is important to note that if you're looking for more power, you'll need to get the Autolite Racing AR103 plugs. The flame front is open compared to the design of the A103. The same benefits apply, with the addition of a couple extra horsepower.

Also note that copper plugs require replacing every 10-15k miles. I replace mine every year, it's just easier. Inexpensive and only takes about 20 minutes.
Where do you purchase your AR103s?
11-03-2016 05:49 PM
mac.mogul
Quote:
Originally Posted by Conman50 View Post
BUT!! The guy at the AZ store said that since I am moving to a lower heat range that I may not be burning fuel efficiently and might possibly burn up the cat converter? Anyone have issues with this? He says If I see a CEL then I should switch back to the hotter plugs.
It is one step colder than the 104. There is zero chance that you will foul a plug and misfire because of the heat range. Your AZ Bro is talking out of his butt.

Now, if you went to something like an Autolite Racing AR92 plug, then you would have issues because that is 4 steps colder and should only be used on a forced induction application with appropriate tuning.

The Autolite 103s are fine for normal use on the Duratec 2.0. Gap them to 0.055 (some have gone to 0.060 with no issue) and you'll never have a problem. You'll see better MPG and smoother engine operation.

It is important to note that if you're looking for more power, you'll need to get the Autolite Racing AR103 plugs. The flame front is open compared to the design of the A103. The same benefits apply, with the addition of a couple extra horsepower.

Also note that copper plugs require replacing every 10-15k miles. I replace mine every year, it's just easier. Inexpensive and only takes about 20 minutes.
11-03-2016 04:49 PM
sailor ^^^ Cross references are NOT always perfect, the type originally used and similar types/brands are usually the best for anything.
11-03-2016 03:15 PM
Miller88
Quote:
Originally Posted by Conman50 View Post

My car DOES NOT like the Bosch plugs. I have a 08 California model SE with 130k miles on it.


I always used to be of the mindset that a spark plug was a spark plug was a spark plug. Until I ended up with a set of NGK in my Jeep. I was seriously considering paying to have the differentials regeared because it had lost so much power. I never put it down to the spark plugs, until I changed them and it suddenly had use of all 4 gears. Was amazed.
11-02-2016 02:54 AM
Conman50 I just put in the A103s gapped at ~.055. I had Bosch platinum's before with 17k miles on them, so not much.

Startup was the same, but for sure this FEELS MUCH SMOOTHER, even with my worn out motor mounts. Idle and while on the move are better. Even if Im not getting more power the smoothness alone is good enough reason to keep using these. Might try 104s eventually see if its the same.

My car DOES NOT like the Bosch plugs. I have a 08 California model SE with 130k miles on it.


But this bring up a question I saw before but not answered, Why is this heat range not installed from the factory?

Also will NGK 103s be pretty much the same?


Thanks so much for this info!
11-02-2016 01:27 AM
sailor You'll know if you get bad misfires from bad gap or plugs, the CEL will start flashing and the car won't drive for sheet when it's bad enough to mess with the CAT.
11-02-2016 01:18 AM
Conman50 I just picked up a set of A103s Going to put the in soon. Im going to gap to .055

BUT!! The guy at the AZ store said that since I am moving to a lower heat range that I may not be burning fuel efficiently and might possibly burn up the cat converter? Anyone have issues with this? He says If I see a CEL then I should switch back to the hotter plugs.

My Car is a stock California SE
10-26-2016 10:21 PM
notfortheweak
Quote:
Originally Posted by barrovian View Post
Just replaced my 2 year old A103's (made in Mexico) for new A103's (made in China). New plugs had silver metal shell, not the black one Autolite copper plugs usually have. Idle is smoother and the Focus has a little more pep. Does anyone have experience or know of the longevity of these Chinese Autolite 103's.
put some in a week ago. Wonderful plug. I, too, noticed the difference from dark color to the shiny silver color.

plug still works great!
next time I will special order some Motorcraft copper core nickel tip plated plugs.
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