"Nightdude" > wrote in
:

> My car recommends also colder plugs for highway/hot climates. The
> insulator on my 'normal' plugs changes colour to dark brown. That's
> after a month driving. Would a colder plug make the burn marks too?



"Brown" is not burning, it's just deposits. Depending on your gas
formulation, some sort of color is expected. By "brown" you probably mean
an uneven deep tan with some gray/black mixed in, correct?

If you had a bright white insulator with bubbles all over it, then you'd be
running too hot.

--
TeGGeR®

The Unofficial Honda/Acura FAQ
www.tegger.com/hondafaq/