Back when I drove bugs, the plugs were inspected at every valve
adjustment.
Perhaps the aircooled Van folks do it this way, too... but honestly,
how many waterboxer people on the list are going to get 100K miles on
their stock engine? And generally, it's a matter of course to replace
the plugs when you put a new engine in something...
And to head off a few replies- I KNOW some of you get that kind of
mileage on your waterboxers. I suspect you're in the minority.

-Simon

On Jun 12, 2004, at 10:54 AM, Bruce Nadig wrote:
<clip>
> By the way, it would be very interesting to hear how often Vanagon
> owners on
> this list change their spark plugs, regardless of what type is used.
> I'd be
> shocked if anyone is waiting to do it every 100,000 miles.