fuel MPG drop!!! - Ford Powerstroke Diesel Forum

 
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post #1 of 7 Old 01-07-2008, 02:39 PM Thread Starter
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fuel MPG drop!!!

The last 4 to 5 weeks i have noticed that my truck is only averaging about 13.5 mpg. This is on the calc, i don't have a lie o meter. I was averaging around 15.7 before. Nothing has changed in this time period. Same driving habbits, same trip to work and back, same outside air temp, etc. The only 2 things that were different was that i took off my tonneau cover to go pickup my camper and i also switched to the white winter bottle of power service, instead of the grey summer bottle. Those are the only 2 differences. Could the power service change my mileage that much from the 2 different bottles? Fuel filter was just changed 2k ago. Oil is in good shape, not rising like i'm getting fuel in the oil. No extra smoke, truck runs fine just like always. Coolant was a little high, but thats because i added a bottle of additive and never drained any coolant to make it equal. Any ideas guys?

Diesel Dan

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post #2 of 7 Old 01-07-2008, 03:05 PM Thread Starter
If it aint a CAT itsa DOG

 
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post #3 of 7 Old 01-07-2008, 03:13 PM
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Its the winter blend fuel Dan. Since it got colder the fuel got more winterized = worse mpg

Email: Dave@powerstroke.org
2011 F150 Ecoboost Crew cab lariat. Custom tunes from KEM and 5Star, and Unleashed
2012 F150 Crew Cab Ecoboost stock for now-Totaled March 12 2015
2006 F250 ECSB Lariat 4x4

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post #4 of 7 Old 01-07-2008, 03:17 PM Thread Starter
If it aint a CAT itsa DOG

 
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Dave do you think since the beginning of Dec, the fuel changed that much? Man if so i know a place where i can still get #2. The truck stop that i fuel up at has polar diesel and #2. I will have to try that. I just thought the blended stuff was at its peak, cause it was very cold in Dec. Thanks for the help Dave!

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post #5 of 7 Old 01-07-2008, 03:21 PM
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Im pretty sure it has since we got down to zero for a couple weeks. my mileage got worse too

Email: Dave@powerstroke.org
2011 F150 Ecoboost Crew cab lariat. Custom tunes from KEM and 5Star, and Unleashed
2012 F150 Crew Cab Ecoboost stock for now-Totaled March 12 2015
2006 F250 ECSB Lariat 4x4

Leveling kit, 315/70/17 Kelly TSRs on Method race wheels
ARP studs and OEM gaskets done by Renegade Diesel
ECM and Atlas 40 FICM tuned by Bill at PHP SCT tunes by Truck Source Diesel. Gearhead, Innovative, Wildman and Tyrant diesel
Flowmaster/MBRP Hybrid Exhaust
Edge Insight CTS
Coolant filter
Bulletproof diesel FICM EGR Delete, Oil Cooler and Water Pump, and Light bar.
Dually LED lights from Stealth Automotive/Xpedition Outfitters
No Limit Fab 6.0 Cold Air Intake
http://www.bulletproofdiesel.com/default.asp
http://nolimitfabrication.com/
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post #6 of 7 Old 01-07-2008, 03:48 PM
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you may have got #1 and not just a #2 blend. #1 sucks for mpg's but is great for not jelling up.

ANDY

My baby is a one of a kind.
1977 I bought a new 76 F150 club cab.
Sitting on a 84 F350 6.9 4X4 chassis
With all the drive train and goodies from a 95 4X4 4door PSD.
Nothing stock left on her and not a nut, bolt, hose, or wire on there that I didn't put where it is.

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Themo King/Mikuni coolant heaters on both to keep things toasty without idling.
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post #7 of 7 Old 01-07-2008, 04:02 PM Thread Starter
If it aint a CAT itsa DOG

 
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yeah i know #1 is good for antigel but i run powerservice winter additive in it anyways so i'm gonna try #2 on my next fill up and see how it goes.

Diesel Dan

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