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Dave Hall wrote: >>I do my plugs every 15K, as the book recommends, >> >> > >I had an idea the original service interval for new plugs on FI was as low as >6,000 miles (clean and re-gap at 3000 miles of course). I've never run them as >little as that. Maybe the modern ones are a bit better quality. > > My '03 Passat has a service interval of 40,000 miles for plug changes. OEM are those NGK iridium plugs with the two ground electrodes, and that's what she got put back in. I did mine at 50k (I've been bad- too busy this summer, in the middle of buying a house) and they had that nice brownish-gray deposits I expect to see on a plug that's been in a car 50k miles. Runs like a new car after that. Averaging 1-2 MPG better, too. ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ List info at http://www.vwtype3.org/list | mailto:gregm@vwtype3.org ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~