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      06-21-2012, 03:18 PM   #21
Chowster
E60_to_E90
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Canada
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Drives: 2011 E90 M3
Join Date: Aug 2010
Location: Surrey, BC, Canada

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Quote:
Originally Posted by Seven7 View Post
I do about 8km/L on the highway before putting on the new exhaust, now I do 12. I've tried driving like I used with the new exhaust and the car downs the whole tank in a day while with the oem exhaust, it took 4 days (flooring it at times and revving it hard at times). Eversince I got this new exhaust system and driving like a grandma, I get gas 3x a week when I only get gas once every 10 days driving the same way but with the oem. I finish a quarter of the tank driving from ubc to Richmond and back, I didnt floor it, I drove 55km/hr the whole way. Even my buddies say theres sth wrong. Do you know who I can bring my car to? I don't want to bring it to the dealer because I'm scared they might void my warrenty
8L/100km is really low. I get about 300km/tank in the city, ~350km mixed city and hwy. I really don't think you're too far off.

Take Deep's advice and seek help from the dealer. If you're scared about warranty, swap back to your OEM exhaust first.
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2011.5 E90 Dinan M3, SS II, M-DCT, EDC, M Drive. Winter setup 220M w/ 255/275 Blizzaks
Performance Mods: Dinan St.1 suspension, exhaust, intake; TTPs; BPM St.II, DCT, servo tunes
Cosmetic Mods: OEM CF splitters, mirrors, center console, spoiler; Arkym CF diffuser; LUX; tint