On Sun, 10 Nov 2019 16:17:53 -0500, Clare Snyder
wrote:

On Sun, 10 Nov 2019 11:22:20 -0700, rbowman
wrote:

On 11/10/2019 05:28 AM, Shadow wrote:
I change my spark plugs every 30.000 Km. And they (and the
cylinders) are absolutely clean when I do. The only damage is from the
electrical arc.

Going on 80,000 miles I know there are spark plugs someplace in my
Toyota's engine, but I've never seen them. Changing plugs is so eighties...
Been changed twice, I think, on my 24 year old Ford. I know I changed
them once at about 320,000km and it was time - - -

I haven't replaced a plug in a car for 30 years. Right now I have a 97
Honda, a 2000 Ford Sport Trac and a 2008 Lincoln. They are all running
the plugs that were in them when I got them.

This is a 1500 hour plug out of my outboard. EFI

http://gfretwell.com/ftp/1500%20hour%20plug.jpg

I don't think I would want to own stock in a spark plug company