What can I REALISTICALLY expect for mileage on 3.0L diesel.

Roadking71865

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Tom
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2021 F150 Platinum 3.0L Diesel
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I have a 6.7L F250 now and get from 12-19MPG with overall avg. of 16MPG. Hoping to improve 5+ MPG on new 3.0L. Could current or past owners give me some input? Also, does anyone use Standyne, AvOx or any other additive and will that help MPG? My ordered truck is coming with 3.31 axle ratio also.





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Tosh

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I currently drive a 3.0 diesel 2007 Jeep Grand Cherokee. It has a 5 speed + 3.73. At 60MPH, the engine is turning @ 2K RPM, and I can get 29 MPG. I must add that it's been re-tuned (the original tuning from Chrysler was - umm - crappy).

If you can't get 30MPG with the new Powerstroke 3.0 + 10 spd + 3.31, you're probably puling a trailer or fighting a terrific headwind.

Oh yeah - the only "additive" I use is a little biofuel. I run B20. Ford says B20 is approved for the 3.0
 

TRSCobra

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I had a 2018 for 27k miles and would regularly average 25-28mpg per tank, but my commute is 50 miles each way of 99% highway. Would get over 18mpg towing a 5500lb open car trailer on highway trips as well. My new 3.5 is lucky to get 20mpg in the same driving conditions, and haven't towed with it yet.
 
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I have had my 3.0 diesel Lariat for about 3 weeks now ,and I have a 3:55 rear end gearing. Been driving it like a old man to see what is the best
average fuel mileage I can get. The best at this time is 24.9 mileage per gallon and not that much drop when I'm towing something.
 

Tosh

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Keep in mind diesel engines can take a long time to break in. For my 2009 TDI, it was 15,000 miles before it achieved it's best MPG.
 

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