Completed approximately six hundred mile road trip. 85% of the trip was highway with Shell93 in the tank at all times. Averaged 23.x MPG in Sport mode with cruise control. In total mixed driving with idling at rest stop etc averaged 19.x after filters. This is the only difference I have experienced after the install. I cannot tell if there is a bit more snap in throttle on at highway speeds or if it is my wallet telling my brain there was improvement there. Windows down there is slight more engine note on WOT but outside of that the increase in sound is negligible.
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Originally Posted by jmciver
Out of curiosity, were there charcoal filters in the filter housings and did you remove them?
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There weren't any. Opened up, removed lid, removed paper filters, inspected, no charcoal filters on this one.