Diesel Fuel Additive?
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Junior User
Joined: Nov 2016
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Diesel Fuel Additive?
Do you guys use any fuel additive on your trucks? I used Opti-lube XPD on my Duramax before and everyone on the Duramax forums swore by it. Being new to Ford, I am interested in what you all do.
Senior User
Joined: Jun 2010
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From: Pennsylvania
Senior User
Joined: Nov 2010
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i also ran ran this until I figured out it was costing me at least 1 to 1.5 mpgs. Strange because the whole reason I bought it was for increasing mpgs. Did the same thing on my old 2014 6.7. Maybe our cetane was already at optimal levels.
Hotshot
Joined: Apr 2013
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From: NH
How could it cost you mpg?
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Senior User
Joined: Nov 2010
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I don't have a clue. Ran it for 3 tanks and driving the exact same speed and route my mpg went down by 1.5. Stopped using it and mpg went back up. Repeated test on different vehicle. Same result. I know cetane affects the combustion rating of the diesel and being more combustible past a certain point must reduce efficiency. Just guessing though.
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Hotshot
Joined: Apr 2013
Posts: 10,120
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From: NH
Interesting. I've run with it and without, never noticed any mpg changes. Cetane rating should be listed on the pump, much like Octane. Ford claims the minimum cetane for all powerstrokes is 45. The pumps in my town are labeled 40. However, the Ford lit stating as much is from 2008. I'm pretty sure I've seen the 6.7L minimum is 40...but it doesn't appear to be in the owners manual.
https://www.fleet.ford.com/truckbbas...s/DSLEGRSS.pdf
https://www.fleet.ford.com/truckbbas...s/DSLEGRSS.pdf
Elder User
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From: Witness Protection Progam
I run Sta-Bil in all my off-road equipment... Generator, ATV, Chainsaw etc. Chevron's Teckron gets used once a year in auto and Off-Road equipment too. Other than than... not much.
Cargo Master
Joined: Feb 2005
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Cetane percentage is not listed on the pumps around here.
As far as additives, I have run Stanadyne, Optilube, Archoil and Power Service in my 6.7's. None showed any fuel economy increase over the other. This may be because cetane level is higher in parts of Texas (48 minimum in 110 counties)
As far as additives, I have run Stanadyne, Optilube, Archoil and Power Service in my 6.7's. None showed any fuel economy increase over the other. This may be because cetane level is higher in parts of Texas (48 minimum in 110 counties)