Re: 100,000 mile spark plugs....
From: LarryT (l02turnercomcast.net)
Date: Wed, 12 Mar 2008 04:35:28 -0700 (PDT)
Cool! Those appear to be Platinum tipped plugs and I don't believe the tips wear like the old plugs but I would have thought there'd be *some* kind of wear visible.

Out of curiosity, what does GM say about the interval for replacing plugs? BTW, my 78 Malibu had a very good engine - much better than the tranny - with electronic ignition, etc and after 20k miles I decided a tuneup was in order - plugs, distr cap, etc. At it turned out, nothing was worn & he dealer said they usually go 80k-100k before a tuneup! Back in 80 something. But I'd spent good money for new parts and by gosh they were going to be changed! ;-)

Take care -

Larry T (66 MGB, 74 911, 78 240D, 91 300D)
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----- Original Message ----- From: <robert_h_bowser [at] juno.com>
To: "Larry Turner" <l02turner [at] comcast.net>
Cc: "The FerrariList" <ferrari [at] ferrarilist.com>
Sent: Wednesday, March 12, 2008 2:39 AM
Subject: [Ferrari] 100,000 mile spark plugs....



As racing season is coming up, I decided to change the spark plugs in my Z06. Never done that before. The car has 102K miles on it, all on the same set of plugs. I've run the car in 24 Open Road Races, so about 2400 of those miles were at 140+ mph. Most of the rest were freeway miles, but I expected some significant wear on the electrodes. I (with much difficulty) pulled them out, and, much to my surprise,...they looked pretty much brand new. Few deposits. Little change to the electrodes. Amazing.


I've attached a picture.  New vs. old plugs.

Bob
'78 308GTS
'01 Corvette Z06
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