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Sensory overload on spark plugs (I am confused)


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I am confused about spark plugs.

Background: I own a 99 Boxster with over 312,000 miles and I’ve been religiously changing my spark plugs every 30,000 miles. I use Bosch 4503 Iridium plugs. I've had no problems and I am very satisfied.

I picked up a 2000 Millennium Edition 911 two years ago. My dealer has records showing the car went in for a water leak and came out with a new engine under warranty at 55,000 miles. The dealer who has serviced it since day one tells me there are about 41,000 miles on the current plugs. The 911 has about 119,000 miles on it now (I put on 10,000 miles). I figure I might as well change them out at 120,000 miles.

I purchased Bosch 7413 spark plugs. They are FGR-6-KQE.

I’ve done research looking at three four different Porsche forums and I’ve seen people saying (I can wait until 60,000 miles to change plugs on early 986s and MK1 996s if I use a hotter range plug). I am probably all wrong here, but I am going to stick to the plugs I am using on my Boxster. My question is am I using the correct plugs for my 2000 911?

I also have no problem changing out plugs on the 996 every 30,000 miles, but if I could go a full 60,000 miles between changes I will no complain.

MNC-I

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Loren,

 

Thanks for the quick response.

If I understand you correctly:

a) I should change my plugs every 60,000 km:

b) I should use Beru plugs FRG-6-KQU  (FGR-6-KQE are Bosch)

c) Am I correct to assume Porsche updated the MK1 maintenance schedule since 1998?

 

Thanks

MNC-I

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Interesting. I'm glad I saw this. I was under the impression that they should be chanced every 60k miles on my MY2000 C2.  Just curious, why would there be different schedules for different years?

Edited by wyovino
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3 hours ago, wyovino said:

Interesting. I'm glad I saw this. I was under the impression that they should be chanced every 60k miles on my MY2000 C2.  Just curious, why would there be different schedules for different years?

Be aware the unit is km not miles. 60,000 km = 40k miles.

 

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