Performance Exhaust & Fuel Efficiency
#1
Performance Exhaust & Fuel Efficiency
I know that having my performance exhaust turned on may inspire me to be a little more heavy on the pedal, but I'm curious if--all else being equal--the performance exhaust settings actually make any difference in the overall fuel efficiency of the vehicle?
#2
MBWorld Fanatic!
Joined: Jun 2019
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From: Flat Earth
AMG C63s Sedan , AMG C43 , AMG G63 , GLK 250
Most definitely effects gas MPG....
#3
#4
I don't believe hitting the PE button changes how the engine revs (whereas switching to Sports Mode does change the revs). It mostly has to do with the valves, from my understanding. Correct me if I have this wrong.
So, all else (including revs) being equal, does activating PE decrease MPG?
#5
Yes, you restated my original question better than I did, thank you.
I don't believe hitting the PE button changes how the engine revs (whereas switching to Sports Mode does change the revs). It mostly has to do with the valves, from my understanding. Correct me if I have this wrong.
So, all else (including revs) being equal, does activating PE decrease MPG?
I don't believe hitting the PE button changes how the engine revs (whereas switching to Sports Mode does change the revs). It mostly has to do with the valves, from my understanding. Correct me if I have this wrong.
So, all else (including revs) being equal, does activating PE decrease MPG?
You should know that this car is obviously not gas friendly. For eg. I filled her up and drove around in Race mode for around 100 km and the tank was almost half gone lol
#6
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Joined: Jun 2019
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From: Flat Earth
AMG C63s Sedan , AMG C43 , AMG G63 , GLK 250
Opening/closing valves will make no difference to mpg. Opening the valves and driving aggressively to hear that intoxicating sound definitely will.
You should know that this car is obviously not gas friendly. For eg. I filled her up and drove around in Race mode for around 100 km and the tank was almost half gone lol
You should know that this car is obviously not gas friendly. For eg. I filled her up and drove around in Race mode for around 100 km and the tank was almost half gone lol
(its not as drastic as changing from Comfort to Sport mode of course) but still effects to a degree) <- from my experience ...
I have aftermarket exhaust on mine, so cannot really speak in terms of stock cars...
#7
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Joined: Nov 2016
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From: Toronto, ON
2021 Mercedes C63s AMG Coupe
Talking about fuel economy in the C63s section ? Just kidding. I think yes the PE does affect the mpg as burble over runs are added only when PE is activated. Overruns and burbles do waste gas more gas than just driving it normally.
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#8
In theory the open valves would allow gasses to flow more freely, which would actually improve MPG. Although probably not noticeably. Realistically, I think the practical effect will be that most people will have a heavier foot with it open and thus correlate to lower miles per gallon.
#9
PE exhaust is usually on and I’m getting 8 MPG with a mix of S+ and C driving. I fuel about every 3 days.
#10
My individual mode setting has powertrain in Sport mode and the PE on. I use an app to keep track of fuel mileage. My 2017 C63 S sedan's mileage has varied from 21.14 MPG (Imperial gallons!) with mixed highway/city driving (I'd guess 60/40, no long highway trips yet) down to 4.63 MPG during about 50 miles of on-track driving. From the trip computer, it looks like the "highway only" mileage is about 25-26 MPG ... giving this vehicle a _huge_ dynamic range of more than 5:1 (thank you modern ICE technology).
As others have stated, I suspect the PE, itself, has no effect on fuel mileage (but does affect "fool [around] mileage").
As others have stated, I suspect the PE, itself, has no effect on fuel mileage (but does affect "fool [around] mileage").
#12
I'm not one of those guys who tries to squeeze every last MPG out of my vehicle, but I do like to understand my vehicles as well as I can. It's more a question of curiosity than any real concern about optimizing mileage.