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Tuning by plug color with todays fuels

I love my Chevy Chevette!
Posts: 5
Joined: 02/14
Posted: 11/01/14 09:27 PM

Well title says it all,I just installed a new 680hr quick fuel on my new 355.I don't have a wideband or dyno so is it impossible to tune by plug color?I'VE read that today's fuels won't color like they use too.I have a msd 6a with msd wires.Plugs are correct heat range.I've ran it about 600 miles and plugs still look new,no color,no glaze,nothing..It runs good,doesn't run hot,no lean surge,and gets 14.8mpg...The plugs looking that new is what has me worried,I'd like to see some tan..  

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