I have been running Evens in the Jetta for ~10 months. I don't think it is really worth it on the street but at the end of a long hot day on the road course I was very happy to have it. My water injection transfer pump failed reducing the WI by ~ half. The improved heat removal from the combustion chamber area made the loss of WI almost unnoticeable. This is remarkable as I am hitting 12 to 13 psi boost with a static CR of 10.4:1.
I will be using Evens for my race rabbit when the new engine goes in.
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