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I get 14-17 mixed city & highway, 18 highway only, and 9.5 towing a 32' travel trailer. I've got the 3.73 rear end and 4x4. You probably won't see a mileage difference between 2wd and 4wd, but 3.73 will get about 1 MPG better on highway.
My truck is straight stock with the 3.73 gears. I average about 13 mpg combination around town and highway. I drove it to the beach and back which is about 160 miles or so, round trip. Averaged 15 - 15.5. I live literally about 5 miles from Mike at 5 star Tuning. He's doing an 87 economy tune and and 87 performance/tow tune for me on Monday. Hopefully I'll be able to squeeze a few more miles out of a tank. It's a big, heavy truck with a big motor, though. I don't expect a huge difference.
My truck is straight stock with the 3.73 gears. I average about 13 mpg combination around town and highway. I drove it to the beach and back which is about 160 miles or so, round trip. Averaged 15 - 15.5. I live literally about 5 miles from Mike at 5 star Tuning. He's doing an 87 economy tune and and 87 performance/tow tune for me on Monday. Hopefully I'll be able to squeeze a few more miles out of a tank. It's a big, heavy truck with a big motor, though. I don't expect a huge difference.
We just got back from a trip to eastern Canada from south central PA. Here's the info:
2011 F-250, 6.2L, XLT 4X4, 4.30 gears, weight of the truck with passengers and loaded for the trip was 7720#. 2000 miles towing 10800# 5th wheel RV over mostly interstate highway. Overall average 8.5 MPG. The best 1 day MPG over about 500 miles was 9.5 MPG, the worst over hilly roads, 8.2 MPG. The numbers came from the trucks computer but were verified by hand. I tried 92 octane for a few fills and did get slightly better millage, but not enough to offset the cost. No noticeable improvement in performance.
We were at about 85% of the trucks max load ratings so we only have a 15% safety margin instead of the recommended 20% so this is about as heavy a load as the truck can handle.
If I'm not mistaken, that 15% is over the 5.4 engine that was standard before the 6.2 came out. I remember Ford making those claims when the 6.2 came out.
If I'm not mistaken, that 15% is over the 5.4 engine that was standard before the 6.2 came out. I remember Ford making those claims when the 6.2 came out.
I checked it out- it IS vague, but it looks like the overall comparison is between present and previous engines. The Diesel comparison is fairly plain, in that it compares the "present" 6.7 to the "previous" 6.4, but the gasoline engine reference is a little more fuzzy. I do know that there have been no changes to the 6.2 that are significant enough to effect a 15% improvement in mileage, so I believe Ford is referring to the 5.4 as the previous engine in this case. If I'm wrong, please advise......
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