When the fan kicks on, I can feel the car slow down, not much, but just a little more load. Instant MPG and GPH do not change at all when this happens, so I haven't really put much thought into it. I believe it is more of a sensation of slowing when the 30amp relay kicks that high speed fan on, when the amps settle down, the load becomes insignificant.
25 degrees this morning. MPG to work was 42.8.
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