DEF consumption - Ford F150 Diesel Forum
 
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post #1 of 10 (permalink) Old 05-23-2019, 04:19 PM Thread Starter
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DEF consumption

I’m at 4600mi with my 19’ Lariat and I’m almost empty on DEF. Is this normal? I read somewhere is was supposed to last till rough 10k. Anyone else have similar issue.
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post #2 of 10 (permalink) Old 05-23-2019, 04:41 PM
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I am tracking just slightly better w/my 2019..

at 3,769 mile
Oil life at 29%
DEF at 3000 to go
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post #3 of 10 (permalink) Old 05-23-2019, 05:21 PM
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Originally Posted by RocknRescue View Post
I’m at 4600mi with my 19’ Lariat and I’m almost empty on DEF. Is this normal? I read somewhere is was supposed to last till rough 10k. Anyone else have similar issue.
All depends on driving style. More go pedal, the more def is used. I did a snowmobile trip to Canada this winter, 4000 lb trailer, and it was 1200 miles round trip. Had to refill in Canada.
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post #4 of 10 (permalink) Old 05-23-2019, 05:21 PM
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I have added roughly a full case into my truck at 10 thousand miles so yeah DEF usage is a little high
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post #5 of 10 (permalink) Old 05-23-2019, 05:35 PM
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DEF tank holds 5.2 gallons and is designed to last 5000 miles for “normal” driving conditions according to the manual.

2018 Ford 150 PS Diesel Platinum FX4 in Ingot Silver w/BuiltRight Rear Seat Release, Gatorback F150 Splash Guards, Lloyd Custom F150 Luxe Carpet Mats & Titan 40 gal replacement fuel tank
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Last edited by jmperlik; 05-23-2019 at 11:14 PM.
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post #6 of 10 (permalink) Old 05-23-2019, 09:21 PM
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My first tank of DEF lasted 14,000 km (8,750 miles). Normal daily driving. No towing
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post #7 of 10 (permalink) Old 05-23-2019, 10:46 PM
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Normal driving I have been adding a 2.5 gallon jug of OEM DEF every 2,500 miles, about 1 gallon per every 1,000 miles. I expect when I get into some longer boat towing trips that the consumption level will increase.

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post #8 of 10 (permalink) Old 05-29-2019, 09:43 PM
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Yep! If I get 5000mi on my DEF if I’m lucky. Oil change sensor also comes on after 4K miles. Looks like it’s going to be a dirty engine with higher maintenance costs.
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post #9 of 10 (permalink) Old 05-29-2019, 10:11 PM
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Originally Posted by wantorun View Post
Yep! If I get 5000mi on my DEF if Iím lucky. Oil change sensor also comes on after 4K miles. Looks like itís going to be a dirty engine with higher maintenance costs.
My oil life monitor seems to be adjusting (going up) the more I drive the truck.

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post #10 of 10 (permalink) Old 05-30-2019, 12:39 PM
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I have a fairly equal combination of highway and city driving. With current usage, I'm set to hit 100% oil usage at about 8000-8500 miles, and DEF should hit about 5500 miles before it runs out.
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