brur

I suppose you lower the torque to compensate for the anti-seize acting like a lubricant.?

MrMoose

Right, that's one issue. Here's a tech bulletin from NGK on why you don't need (and shouldn't use) anti-sieze on plugs with plated threads.

http://www.jagrepair.com/images/Auto...1antisieze.pdf

Since Porsche specifically says not to use it I'd assume they know what they're talking about on their plugs and cars.

venom51

How about we just go with..I'll do what has worked for me for the last 30 years of racing and you guys do what ever Porsche tells you to do.

Hoosier_Daddy

Excellent advice.

Quadcammer

30 years of racing and you don't know that the plugs go in the cylinder head and not the block?

venom51

No...you don't say. Did Porsche spell that out in a manual for you?

Hoosier_Daddy

Alright, let's all relax. Venom, you do have to expect some push back with this collective when you are advising folks to do something that is in direct contradiction to what the vehicle manufacturer AND a major spark plug manufacturer is advising. No one is saying you don’t know what you’re doing (well maybe Quad is goofing around in jest) -- they just disagree. Doctors used to perform bloodletting and lobotomies, but standards change. All is cool.

Apologies I was flip about the advice... certainly don't want a flame war breaking out or folks piling on.

venom51

All is good. I may not be "necessary" but history has shown me through many a poorly maintained motorcycle of all brands that corrosion is not your friend.

996AE

Just bought a very nice 1999 Ford Mustang Cobra with lots of track mods. 30k original miles. Car was still running amazing on OEM factory installed 1998 build date spark plugs.

I replaced only because of age and concerns longer term that corrosion would cause problems extracting from aluminum heads.

Most owners manuals talk about age and time. Not that sparkies go bad its the corrosion that can be costly.

PorscheAddict

I will say, my plugs were replaced on schedule at 4 years 26k miles, and they were really really tight/seized. I didn't put antiseize just because I plan to replace every 2 years from now on, but I'd consider otherwise.

Dave in Chicago

Update - Gas mileage appears to have improved approx 2 mpg over similar week's driving. Hmm....

Dave

dlbehrns

" I now realize how ridiculous the dealer price really is" What you are seeing is what I call the Porsche Premium. Parts and labor are inflated ad nauseum. You can find Bosch oem plug FGR5NQ1E04 at Autozone for $13 each.
IMHO: Many, but not all, Porsche and luxury car owners are fortunate and are able to not question the cost of the Porsche periodic maintenance i.e. parts and labor. I firmly believe that Porsche knowingly takes advantage of uninformed or uneducated(mechanically) owners who do not ask questions because they can afford to do so. WTS here's an example: I wanted to replace the driver's side door sill name plate because of a dent in the Cayman insignia. Dealer wanted $650. Suncoast out of Florida sent it to me for $70. I can hear you say "are you F'n kidding me?" I am not and, it took me 15 minutes to swap it out. Dare I say capitalism is predatory. Caveat emptor. Just sayin. )

dlbehrns

"Most spark plugs have a factory service interval of 100,000 miles, though some may be as much as 120,000 miles. Long-life platinum and iridium spark plugs will typically last up to 100,000 miles or longer provided the engine isn't using oil or doesn't spend a lot of time idling."
Gas+spark+air=combustion. It's all the same in every motor. Nothing special about Porsche. (I'm sure I"m gonna catch hell for this one LOL)

schell

I think it is not a bad idea to change plugs every 6-8 years just so they are easy to remove, after 10 years they might not come out so easy.

dlbehrns

I agree however, I’m only suggesting people don’t drink the dealer Kool-Aid and do their homework.Nobody likes to be taken to the cleaners.