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      04-30-2015, 02:48 PM   #1
squartus
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2010 E92 BMW M3  [5.00]
Supercharged MPG

I just went on a fairly long road trip to Michigan and back, over 2k miles round trip. I logged the miles and gas put into car to see what we actually get with these cars supercharged. ESS 625 in this case, iv always been told with the bigger fuel injectors the car does not read proper MPG after SC install.



I used 110 GAL of 93 octane, which put me at 19.03 MPG. Fair amount lower than what car told me.
Now this is with AC on and couple hours of 90-100mph here and there so was not steady 80MPH. All but 30miles of this is HWY miles, I had to stop for food/hotel/gas ets.
Still not terrible for a 625hp forced induction car.
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      04-30-2015, 03:32 PM   #2
Patrón
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not bad on the highway...
my computer is reading 14.2-14.3 i don't have any clue what the actual mileage is but i'm guess in the 10mpg range. but it's worth it.
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      04-30-2015, 04:08 PM   #3
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My computer reads 21.7 , I have a ESS 625 kit. I do a lot of highway driving, tend to baby the car unless I feel the need to drive it hard. I typically shift around 3500 rpm.
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      04-30-2015, 04:26 PM   #4
Roman@ESS
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Quote:
Originally Posted by squartus View Post
I just went on a fairly long road trip to Michigan and back, over 2k miles round trip. I logged the miles and gas put into car to see what we actually get with these cars supercharged. ESS 625 in this case, iv always been told with the bigger fuel injectors the car does not read proper MPG after SC install.



I used 110 GAL of 93 octane, which put me at 19.03 MPG. Fair amount lower than what car told me.
Now this is with AC on and couple hours of 90-100mph here and there so was not steady 80MPH. All but 30miles of this is HWY miles, I had to stop for food/hotel/gas ets.
Still not terrible for a 625hp forced induction car.
The display will not be accurate. I found on all of my supercharged M3's my average MPG was usually around 18 with a mix of highway and spirited driving.
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      04-30-2015, 04:30 PM   #5
squartus
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Yep my real MPG for that trip was 19.03, was just seeing what the difference in real world MPG was over a long distance.
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      04-30-2015, 06:40 PM   #6
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I drive my M3 daily and sees 90% city driving with 9% highway and 1% track/airstrip. Surprisingly after resetting my MPG values about 6,000 miles ago I've been seeing 17-18mpg and I don't drive slow. I got about the same in my tuned/meth n54 335. My n55 X5 gets 14mpg all city driving.
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