I belong to an online forum of Colorado owners (coloradofans.com) and created a poll to see which fuel system cleaner the members liked best. This one did very well, so I tried it and I like the results. I have poured a bottle in the tank prior to every oil change recently.
I also like Techron, because it seems to give me a smoother idle over each tank of gas. Redline seems to bring out the raw power of my engine though.
I am not a mechanic, but it seems to work for me.
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