What Have You Done To Your Tdm Today?

[jbx]

Main benefit of the iridium plugs is their lifetime and ability to endure higher working temperatures, but on the 9er, standard plugs already last easily 40.000km, mainly  due to the low average rpm, the fuel injection (which allows stable working conditions) and the cylinder ceramic coating which prevent oil burning.

 

The 850 engine has only low rpm to spare the plugs, having iridium plugs will be no improvement but a waste of money.

 

That said, on iridium plugs only the central electrode is iridium plated (layer is a few atoms thick), but not the ground electrode !

This post was last modified: 16-12-2016, 09:57 PM by jbx.