I know that everyone has their own standards and lots of variables, but I am doing a speech on the benefits of propane over gasoline and was trying to get the average mileage for spark plug changes. I know that oil is said to be 3,000 depending on type (synthetic, etc) but I need some sort of concrete numbers. I feel stupid asking this because I have my own standards of how often I do mine, but I was just trying to get like, dealer recommendations or something of that nature. Just an all inclusive average for all cars in general.

11/3/2005 7:54:26 PM

http://www.google.com/search?ie=UTF-8&oe=UTF-8&q=spark+plug+changing+intervals

first couple links might help you out.

But I've heard ~100k on today's platinums/iridiums, assuming you dont run them super lean/rich all the time

11/3/2005 7:56:26 PM