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Old 05-08-2012, 01:56 AM   #407
Scooby Newbie
Member#: 56219
Join Date: Feb 2004
Chapter/Region: NESIC
Location: Vermont
2011 WRX STI Limited


Originally Posted by kingme
Gordy, do you plan on analyzing your oil? I'm curious if the new tune is rich for safety, causing your lower mileage. A UOA might show high fuel dilution which would lower flashpoint and viscosity. Maybe the tech recommended 5W-40 because he knew a 5W-30 would be further weakened by fuel dilution.

Of course, this assumes the tech knew anything about your special tune . Regardless, still curious.
Oh yeah! I have my blackstone sample bottle sitting on the shelf. This Map has to be silly rich compared to the first. I had the cruise set this morning @ 73 MPH, 6th gear, Intelligent mode, I watched the meter drop 0.5 MPG in the A/C OFF , 62 35mile ride to work. For a total WHOPPING 20.1 MPG ... Nice !
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