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12-07-2017, 05:07 PM
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#1
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Senior Member
Tiffin Owners Club
Join Date: Jun 2017
Location: Atlanta
Posts: 614
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Engine brake, mileage
Does using the engine brake decrease mpg?
Thanks.
Chuck
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2014 Tiffin Phaeton 40QBH
2014 Honda CR-V Toad
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12-07-2017, 05:16 PM
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#2
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Senior Member
Join Date: Oct 2006
Location: Rochester NY
Posts: 2,706
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The answer is no, engine brakes when engaged do not cause the engine to consume any diesel fuel when engaged. The ECM shuts off all fuel flow when the engine brake (or compression brake, NOT necessarily a transmission brake) is engaged. The latter w.r.t. a transmission brake is my ignorance, as I am not as familiar with its operation.
You're gliding along at 256 MPG.
__________________
Don
'07 Winnebago Journey 34H - CAT C7, Koni's, MCU's, SS Bell Crank, Safe-T-Plus
'07 HHR Toad, SMI AFO, Blue OX
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12-07-2017, 05:17 PM
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#3
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Senior Member
Join Date: Jul 2014
Posts: 35,424
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It only activates when your not pressing on the throttle, so no it doesn't.
Diesel engines stop fuel flow to the cylinders, when the throttle is released, until the engine drops to idle speed or you step on it again.
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12-07-2017, 05:20 PM
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#4
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Senior Member
Tiffin Owners Club
Join Date: Jun 2017
Location: Atlanta
Posts: 614
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Quote:
Originally Posted by Pusherman
The answer is no, engine brakes when engaged do not cause the engine to consume any diesel fuel when engaged. The ECM shuts off all fuel flow when the engine brake (or compression brake, NOT necessarily a transmission brake) is engaged. The latter w.r.t. a transmission brake is my ignorance, as I am not as familiar with its operation.
You're gliding along at 256 MPG.
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256 MPG beats the heck outta 8 MPG!!!
Thanks guys.
Chuck
__________________
2014 Tiffin Phaeton 40QBH
2014 Honda CR-V Toad
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12-07-2017, 07:08 PM
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#5
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Senior Member
Join Date: Mar 2017
Location: Zebulon, NC
Posts: 5,211
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Quote:
Originally Posted by Air Conditioned Gypsy
256 MPG beats the heck outta 8 MPG!!!
Thanks guys.
Chuck
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Our Prius gets well over 100 MPG......
In dynamic braking coming down hills.. 
__________________
Kelly and Jerry Powell with Halo (Lethal White Aussie), Nash the Rat Terrorist, and now Reid, the "Brindle we have no idea puppy"
2020 Grand Design Solitude 390RK-R
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12-07-2017, 07:55 PM
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#6
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Senior Member
Join Date: Dec 2009
Location: Out there, somewhere
Posts: 9,941
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Quote:
Originally Posted by ThePowells
Our Prius gets well over 100 MPG......
In dynamic braking coming down hills.. |
Yeah but, you have to drive a Prius!😒
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12-07-2017, 08:45 PM
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#7
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Senior Member
Country Coach Owners Club
Join Date: Dec 2010
Posts: 7,801
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Using the engine brake gets me 99MPG. But then again, that is going down hill
__________________
Don
2002 Country Coach Intrigue
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12-08-2017, 12:26 AM
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#8
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Senior Member
Fleetwood Owners Club
Join Date: Jun 2011
Posts: 690
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For some life is all downhill.
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12-08-2017, 09:19 PM
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#9
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Senior Member
Join Date: Aug 2001
Location: North America somewhere
Posts: 30,903
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Yes it does increase mileage until you lose it again on the next upgrade.
Quote:
Originally Posted by Alan24601
For some life is all downhill.
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I don't mind going downhill, it's the sudden stop at the bottom that's a killer.
__________________
2000 Winnebago Ultimate Freedom USQ40JD , ISC 8.3 Cummins 350, Spartan MM Chassis. USA IN 1SG 11B5MX,Infantry retired;Good Sam Life member,FMCA. " My fellow Americans, ask not what your country can do for you, ask what you can do for your country. John F. Kennedy
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