benzo Posted July 18, 2009 Report Share Posted July 18, 2009 I have been using NGK with good success but have wondered about the iridium plugs performance. have any of you used them with good or bad results? thanks Quote Link to comment
72240z Posted July 18, 2009 Report Share Posted July 18, 2009 (edited) The heat range depends on the motor. Just a regular L series I wouldn't use anything but regular ngks. Edited July 18, 2009 by 72240z Quote Link to comment
Dat620guy Posted July 18, 2009 Report Share Posted July 18, 2009 I put the NGK iridiums in my 620. They seem to be a good plug. It has a little better response and im not going through gas as quick. So I think I gained 1-2 mpg in the process. I always hear good and bad things about them. Try them for yourself. Quote Link to comment
Bleach Posted July 18, 2009 Report Share Posted July 18, 2009 As a general rule, just the normal NGK plugs for $2 are perfect. Putting brand new plugs in will generally see a little better response at first anyway ;) Quote Link to comment
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