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Daox · 07-24-2008, 10:42 PM

I'd agree with Lazarus. Platinum and Iridium plugs are mainly there because they last longer, not because of higher performance. IMO check your plugs more often and stay with the cheaper copper.

07-24-2008, 10:42 PM	#4 (permalink)
Daox Administrator Join Date: Dec 2007 Location: Germantown, WI Posts: 11,203 CM400E - '81 Honda CM400E 90 day: 51.49 mpg (US) Daox's Grey Prius - '04 Toyota Prius Team Toyota 90 day: 49.53 mpg (US) Daox's Insight - '00 Honda Insight 90 day: 64.33 mpg (US) Swarthy - '14 Mitsubishi Mirage DE Mitsubishi 90 day: 56.69 mpg (US) Daox's Volt - '13 Chevrolet Volt Thanks: 2,501 Thanked 2,588 Times in 1,555 Posts	I'd agree with Lazarus. Platinum and Iridium plugs are mainly there because they last longer, not because of higher performance. IMO check your plugs more often and stay with the cheaper copper. __________________ Current project: A better alternator delete