EAT chip
I "believe" I get slightly better mileage with my chip which I have had for about 3 years. I run mostly Chevron 93 octane. However, I have over 100,000 miles on my o2 sensor so I suspect is is dragging it down a bit.
At 70 MPH I get 27-28 mpg, at 55 to 60 mph or so, 30-31 mpg. Hard to tell in town as I usually get 15 or so in stop and go traffic. Better if taffic is moving well. I generally average 23-24 overall.
Thanks,
1995 525i Auto, M50TU 2.5L, EAT chip, 1/95 build, USA, 205/65/15 tires, ASC+T, HID, lumbar, EC Mirror, BMW Alpine 5 radio with BMW-Pioneer CD Changer, abt 236k miles, Oxford Green/Parchment