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Old 02-29-2008, 02:24 AM   #1
Scooby Newbie
Member#: 79031
Join Date: Jan 2005
Location: Oxnard
04 STI
WRB w/ Gold

Default Diamond fire plugs

Has anyone ever used this plugs and are they worth it?
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Old 02-29-2008, 01:01 PM   #2
Scooby Newbie
Member#: 171561
Join Date: Feb 2008
Location: PHX, AZ
2002 WRX wagon


I actually went for it. First time I thought a gimmic type plug could actually be beneficial. I have an 02 wrx and I was in need of an oil change and the coolant in that was put in my car before I bought it was not phosphate free and it was rich. so I just changed everything and my car ran significantly better. I used the diamond fire plugs but I don't know how much that contributed considering I also put the right fluid in with the right mixture and royal purple oil after a well needed change when it was using penzoil. I think the plug makes sense in not only lasting long but providing a good chance for more even combustion?
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