BMW Tune MPG

sodixm · 04-13-2024, 11:46 AM

Recently got my car tuned, and went catless, I got both a transmission tune and ECU tune. It is mapped for some burbles/noise but not a lot at all. I’ve been driving it for about a day now, maybe 20 miles in total, 5 of those being in sport, and I’m averaging 10mpg LOL. Will the tune eventually learn and I will get better gas mileage or am I screwed?
Thanks

CalibratEd · 04-13-2024, 10:59 PM

Posting a datalog might help. How hard are you driving the car? lol

scubajim · 04-14-2024, 06:41 AM

I am also guessing the new tune is causing you to have a heavy foot. I think once the "newness" wears off you will be less inclined to test it. Give it a few weeks then recheck your numbers.

n55david · 04-14-2024, 08:12 AM

It's because of how you're driving. Mog when not in boost isn't effected.

rlesko · 04-15-2024, 07:45 PM

I am 100% sure the tune isn't giving you bad gas mileage, especially with such a pitifully small sample size (20 miles). I was getting worse gas mileage right after I tuned my car as well. It will pass.

thejeremyman9 · 04-22-2024, 04:50 PM

As stated above, tune shouldnt affect cruise MPG, unless you have some weird tune(er).

It's using sport mode and your right foot that are affecting MPG. Once you are tuned you generally need less throttle input to achieve the same speed and you are probably using the same or more.

04-13-2024, 11:46 AM	#1
sodixm Enlisted Member 8 Rep 48 Posts Drives: BMW 335i, 435i Join Date: Jun 2020 Location: MI iTrader: (0)	BMW Tune MPG Recently got my car tuned, and went catless, I got both a transmission tune and ECU tune. It is mapped for some burbles/noise but not a lot at all. I’ve been driving it for about a day now, maybe 20 miles in total, 5 of those being in sport, and I’m averaging 10mpg LOL. Will the tune eventually learn and I will get better gas mileage or am I screwed? Thanks
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04-13-2024, 10:59 PM	#2
CalibratEd New Member 2 Rep 11 Posts Drives: N/A Join Date: Dec 2023 Location: N/A iTrader: (0)	Posting a datalog might help. How hard are you driving the car? lol __________________ Instagram: calibrated.tuning
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04-14-2024, 06:41 AM	#3
scubajim Enlisted Member 15 Rep 42 Posts Drives: 2016 BMW F33 Join Date: Oct 2023 Location: Milford CT iTrader: (0)	I am also guessing the new tune is causing you to have a heavy foot. I think once the "newness" wears off you will be less inclined to test it. Give it a few weeks then recheck your numbers. __________________
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04-14-2024, 08:12 AM	#4
n55david Check out my Youtube @n55david! 1296 Rep 3,533 Posts Drives: 2017 m240i, 2015 X3 x35i Join Date: Aug 2018 Location: Michigan USA iTrader: (0) Garage List 2017 m240i xDrive [0.00] 2015 X3 x35i [0.00] 2015 335i xdrive [0.00]	It's because of how you're driving. Mog when not in boost isn't effected. __________________ 2017 m240i xDrive 10.99@122.86mph bootmod3 stage 2+ ots 2015 335i xDrive 10.95@124.99mph w/bm3 - SOLD 2015 X3 x35i pwg 12.96 catless w/bm3 stage 2 93 ots IG: @n55david For pics and updates! Youtube: @ n55david For videos or Racing etc
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04-15-2024, 07:45 PM	#5
rlesko Lieutenant 233 Rep 481 Posts Drives: F30 335i Join Date: Jan 2023 Location: New England iTrader: (1) Garage List 2012 335i [0.00]	I am 100% sure the tune isn't giving you bad gas mileage, especially with such a pitifully small sample size (20 miles). I was getting worse gas mileage right after I tuned my car as well. It will pass. __________________ Performance Mods: Eibach Pro Kit Springs, Eibach Sway Bars, KONI SA Dampers, M Perf Rear Brakes, Dinan Free Flow Exhaust, MHD Stage 2 Retrofit: Reversing Camera, Rear PDC, Front PDC, NBT Evo
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04-22-2024, 04:50 PM	#6
thejeremyman9 Major General 4364 Rep 7,606 Posts Drives: 2015 BMW 335i Join Date: May 2019 Location: Cali iTrader: (0)	As stated above, tune shouldnt affect cruise MPG, unless you have some weird tune(er). It's using sport mode and your right foot that are affecting MPG. Once you are tuned you generally need less throttle input to achieve the same speed and you are probably using the same or more.
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