I've ran the stock NGK 5 plugs, the NGK 6 plugs the NGK V powers, Autolite, Bosch Platinum, Bosch Platinum 2, and the Bosh Platinum 4s.

After running about 50% of these plugs I changed to the Bosch Platinum 4s and then ran the other 50% of these plugs. I'm now back to the Platinum 4s and will never buy another type of plug.

The other plugs gave less power, less fuel economy, and more carbon deposits.

Most fuel problems that people think come from bad plugs are actually because they are running crappy gas that has more water in it and are not changing their fuel and air filters frequently enough. Most people also forget to frequently clean their fuel system to remove contaminants in the injectors.

Logansportage <img src="/forums/images/graemlins/patriot.gif" alt="" />