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Old 08-18-2011, 08:46 AM
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Improve Fuel Mileage?

Hello all, Iím new here & recently bought a 2006 F-350 4x4 DRW Crew Cab Lariat 6.0L V-8 Diesel with a 4.3 ratio limited slip axle to pull a 37í fifth wheel camper. As you can guess the fuel mileage is less than desirable. Iím currently looking to purchase a Quadzilla M3 Ford MAX Mileage Module but canít find much info if it has a good track record. Does anyone have any experience with this product or can offer some advice on how to improve the fuel mileage? As far as power goes I am well pleased with how easy the truck pulls the camper. Iíve had no problems pulling in the mountains. Thanks
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Old 08-18-2011, 08:56 AM
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First of welcome to the ORG! Everyone on here is going to tell you that SCT with custom tunes is the only way to tune your truck... and I agree. Before you do anything a good monitoring device or gauges is a requirement for the 6.0! The highest power tunes offer the best mileage, when driven sensibly. The biggest factor in mileage is your right foot! Hope that helps
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Old 08-18-2011, 11:00 AM
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If it's not done already straight pipe the exhaust. I saw a 2.5 mpg increase running stock program.
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Old 08-18-2011, 11:34 AM
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Quote:
Originally Posted by rowcoach View Post
If it's not done already straight pipe the exhaust. I saw a 2.5 mpg increase running stock program.
The only way you saw anything like that was if your cat converter was totally clogged up. There is no significant mileage gain or power gain from an exhaust system upgrade.

D3YN3LL, the first thing you need to do is get a good monitoring solution like the Edge Insight CS or CTS so you can tell what your truck is doing. You don't want to be caught away from home with your 37 foot 5er and a broken truck that you could have avoided.

Then a SCT X3 with custom tuning is what you want for the 6.0. Forget any of the other tuners out there. You need custom tunes for the 6.0 or it will cost you things like transmissions.
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Old 08-18-2011, 05:25 PM
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Quote:
Originally Posted by D3YN3LL View Post
Hello all, Iím new here & recently bought a 2006 F-350 4x4 DRW Crew Cab Lariat 6.0L V-8 Diesel with a 4.3 ratio limited slip axle to pull a 37í fifth wheel camper. As you can guess the fuel mileage is less than desirable. Iím currently looking to purchase a Quadzilla M3 Ford MAX Mileage Module but canít find much info if it has a good track record. Does anyone have any experience with this product or can offer some advice on how to improve the fuel mileage? As far as power goes I am well pleased with how easy the truck pulls the camper. Iíve had no problems pulling in the mountains. Thanks
I have the '07 version of that truck basically, though I have yet to put that kinda load behind it. The first thing I did was a set of gauges, which in hindsight all you really need is an Edge Insight CS/CTS to keep an eye on everything, get the expandable Pryo and Fuel Pressure sensors if you can manage it. That is the easiest way to prevent little issues from costing a fortune in the long run.

For tunes, The SCT tuner is the only way to go. I ran IDP's street and X-Race with a factory exhaust (including CAT) and didn't have an issue with EGT's climbing to bad at all. The tow files on the SCT are remarkable, it will firm up the shifts and take full advantage of the engine braking of the VGT.

I like the 4.30's at stock height, never had an issue in the steep grades, and don't have an issue getting up to speed on the interstate.

For comparison, Stock - 10-12 City, 13.5 combined, and 15 mpg Interstate.
Tuned - Tow, I've managed the do .5-1mpg better than stock emtpy with a 7K load.
Street - 11-13 city, 14.6 combined, and 16+ mpg Interstate.
X-Race - 11-14 city, 15.3 combined, and 16.5 + mpg Interstate.
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