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Old 02-12-2015, 04:25 PM   #24 (permalink)
herp derp Apprentice
Join Date: Oct 2008
Location: Lawrence, KS
Posts: 1,044

Saturn-sold - '99 saturn sc1
Team Saturn
90 day: 28.28 mpg (US)

Yukon - '03 GMC Yukon Denali
90 day: 15.11 mpg (US)
Thanks: 43
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Not the numbers on these are neccisarily acurate across different engines, but of all the ones i can recall, the hc emmisions low point is richer than the engine is capable of running. I would be surprised if your best economy would be found beyond the point where you start pushing more fuel out the tailpipe.
Only way I could think to find / tune to that concept would be borrowing a shops 5gas analyzer
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