Exhaust Cleaning Message
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Senior User
Joined: Nov 2005
Posts: 163
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From: Port Orange Florida
Exhaust Cleaning Message
Guys, I was driving the other day (60 mph) and reset my MPG meter and went approx 10 miles before it leveled off and avg 17.6 mpg...after driving a few more miles, I saw the message center say "cleaning exhaust" I pressed ok and drove a few more miles at 60 mph. I then noticed my MPG drop to 14.5...My question is...does the cleaning of the exhaust effect MPG that much??
Lead Driver
Joined: Jan 2010
Posts: 6,600
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Seems about right since that was a fairly fresh reset (it's more sensitive due to less time on the counter).
On average I have one active regen per tank of fuel and that works out to be around a 1 MPG loss.
So I have just assumed that it's an average of a 1 MPG loss per active regen.
I think others have posted similar "averages."
For example, lets say my screen reports 16.0 MPG.
Towards the end of the tank my truck enters an active regen and completes.
The counter has been running the whole time but it now reports in the low 15's.
This assumption is no way scientific.
The truck has to do this process so while I pay attention, I don't try to figure out all the details related to this and fuel use.
On average I have one active regen per tank of fuel and that works out to be around a 1 MPG loss.
So I have just assumed that it's an average of a 1 MPG loss per active regen.
I think others have posted similar "averages."
For example, lets say my screen reports 16.0 MPG.
Towards the end of the tank my truck enters an active regen and completes.
The counter has been running the whole time but it now reports in the low 15's.
This assumption is no way scientific.
The truck has to do this process so while I pay attention, I don't try to figure out all the details related to this and fuel use.
Post Fiend
Joined: Apr 2004
Posts: 5,158
Likes: 35
From: North of Salt Lake City
If you're on the highway, the event will complete in about 10 minutes. Driving around town you never know. All the stop and go traffic causes the regen to stop and start. It can take a half hour to clean the DPF while on on surface streets.
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Milwaukee1979F150
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