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      01-19-2013, 01:56 PM   #1
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bigjae1976's Avatar

Drives: 11 E90 M3 Individual
Join Date: Mar 2006
Location: Wichita, KS

iTrader: (14)

Garage List
2004 BMW M3  [4.50]
2011 BMW E90 M3  [5.00]
2013 BMW 328i  [5.00]
Better MPG PSS vs RS3 vs Z1SS

So far, I've had PS2s (OE sizes), RS3s (275s) and Z1 Star Specs (275S) on my M3. All returned about 18-19mpg on the highway. I put on some PSS and I'm getting 22mpg even when I'm doing 90mph (in an 85mph zone before the holyier than thou group start to admonish me for speeding and how I will kill innocent kids, insects, and animals and I am totally irresponsible and they have never even gone 1mph over the speed limit...I hate those people).

Is that possible? I also took my car in for service for a bad vacuum brake booster sensor. But I've only gotten at best 19.5mph on the highway since I've owned the car.
2015 F34 328iX GT Glacier Silver
2011 E90 M3 Monte Carlo Blue
2004 E46 M3 Imola Red