Performance Exhaust & Fuel Efficiency
Thread Starter
Member
Joined: Apr 2018
Posts: 139
Likes: 39
From: Iowa
2014 CLA45; 2019 C63s
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?
MBWorld Fanatic!
Joined: Jun 2019
Posts: 1,453
Likes: 399
From: Flat Earth
AMG C63s Sedan , AMG C43 , AMG G63 , GLK 250
Most definitely effects gas MPG....
Senior Member
Joined: Jan 2019
Posts: 439
Likes: 74
From: California
2019 AMG C63S
Thread Starter
Member
Joined: Apr 2018
Posts: 139
Likes: 39
From: Iowa
2014 CLA45; 2019 C63s
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?
MBWorld Fanatic!
Joined: Jul 2011
Posts: 1,146
Likes: 207
2019 AMG GT R
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
MBWorld Fanatic!
Joined: Jun 2019
Posts: 1,453
Likes: 399
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...
MBWorld Fanatic!
Joined: Nov 2016
Posts: 1,527
Likes: 287
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.
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.
Trending Topics
Senior Member
Joined: Jun 2019
Posts: 453
Likes: 91
From: DFW, Texas
2017 AMG C63
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.
MB World Stories
The Best of Mercedes & AMG
6 Mercedes Models That Did NOT Age Well (But Are Somehow Still Cool)
Verdad Gallardo
Manual Mercedes? 6 Times Sindelfingen Let Drivers Have All The Fun
Verdad Gallardo
Mercedes SLR McLaren 722 S Is Extremely Rare Example Modified by McLaren
Verdad Gallardo
8 Classic Boxy Mercedes Designs That Have Aged Like Fine Wine
Verdad Gallardo
Flawlessly Restored Mercedes 190E Evo II Heads to Auction
Verdad Gallardo
Electric Mercedes C-Class Unveiled: 11 Things You Need to Know
Verdad Gallardo
Mercedes EQS Gets A Major Update: Everything You Need to Know
Verdad Gallardo
5 Underrated Mercedes-Benz Models That Don't Get the Love They Deserve
Verdad Gallardo
Mercedes 300D Has Pushed Well Past 1 Million Miles and It Ain't Stopping
Verdad Gallardo
Member
Joined: Dec 2017
Posts: 100
Likes: 8
AMG C63S
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.
MBWorld Fanatic!
Joined: Dec 2013
Posts: 1,087
Likes: 509
*
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").
Thread Starter
Member
Joined: Apr 2018
Posts: 139
Likes: 39
From: Iowa
2014 CLA45; 2019 C63s
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.
