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First, I’m new here, so let me know if this not allowed or is in the wrong place.
Just purchased a new 2020 F250 CCSB 7.3 with 3.55. As I look at the MPG polls I realize that I am no where near those numbers. On the Hwy I’m right at 12.0 and combined/ town I’m around 11.5.
There is only about 800 miles on the truck. Is this normal? This is my first new vehicle purchase ever. In the past I have driven a 2011 6.7, I wasn’t looking for the same gas mileage, mainly an engine I could work on myself and still haul a 9,000lb RV occasionally and a utility trailer. In fact, I don’t expect to get great mileage, this is more of an initial break in question/ normal operation thing.
Just curious what everyone thinks, is this normal for a new engine?
My personal opinion from owning many new trucks is just drive it and enjoy it. I would change the oil at 3,000 miles then every 6-7k miles after that for normal conditions (using this method my '12' 6.2 has 203k miles), don't know if it mattered but I figured it couldn't hurt. I believe it says in the owners manual to hold off on towing for a certain many miles but could be wrong.
All of my trucks trucks had 225-250k miles before retiring them to a new owner.
Poor mileage might be from enjoying the power from the 7.3.
I wonder if the "BSEG" from the V10s carry over to the 7.3.
I don't think 12 hwy is too bad. Every thing has to be perfect...including gas quality...for your configuration to get 14. Take those polls with a grain of salt. IMO, fuel economy has to be hand calculated and the truck/car filled and refilled to the top at the same gas pump (so the truck is setting at the same slope) for best accuracy. There are a lot of variables that are hard to pin down. Our diesel, when towing, gets 11.5 -12 east of the Mississippi but 8 on the trips we've taken west of the Mississippi...guessing it's due to biodiesel. I know you have gas, but point is there are many variables.
Won't hurt to jack up each tire and check for free spin, check air in tires, make sure a mouse didn't build a nest in the air filter, etc.
65Ford
That was pretty spot on. After reading that I thought to myself that I haven’t actually checked the tore
pressure. They were all at 50! From the dealer like that, maybe to give it a better ride during test drives or just like me, never checked. After putting them at 60 and 65, MpG shot up to 14-15 on the hwy. Also, I did find a mouse nest inside the frame just above the passenger rear tire. It’s that time of year as everything cools off they look for somewhere
warm, just above the exhaust is a square cut into the frame. Gotta check that daily now and any lines in that area. Thanks!
Originally Posted by '65Ford
I don't think 12 hwy is too bad. Every thing has to be perfect...including gas quality...for your configuration to get 14. Take those polls with a grain of salt. IMO, fuel economy has to be hand calculated and the truck/car filled and refilled to the top at the same gas pump (so the truck is setting at the same slope) for best accuracy. There are a lot of variables that are hard to pin down. Our diesel, when towing, gets 11.5 -12 east of the Mississippi but 8 on the trips we've taken west of the Mississippi...guessing it's due to biodiesel. I know you have gas, but point is there are many variables.
Won't hurt to jack up each tire and check for free spin, check air in tires, make sure a mouse didn't build a nest in the air filter, etc.
I think you will discover that your fuel mileage will increase considerably as you accumulate miles. 6.2 with 4.30's here. 12 MPG initially; overall. Now with 45K on the odometer; I easily am doing 15 MPG. Those differentials are really tight for a considerable amount of miles. It will loosen up and mileage will improve.
This is our new 7.3 gas F-350 XLT SRW SB SC 4WD 4.30's 10 speed auto 5th wheel prep 12.4-12.5 has appeared on the odo all along.
Empty running up and down steep hills on 'normal' getting the pedal down on occasion to see where the end of power was. None found.
This should improve with a few more miles. Without the big load, this thing will get out of it's own way.
I like the display screen much better than the cheesy looking xl screen. That alone would be must for me before looking any further at a truck, shallow maybe but keeping a truck 200,000+ miles it's something that will be looked at a lot.
Seat of the pants reviews of the 7.3 are looking good.
Another helpful user on here pointed out how tight the rear diff is, and after talking to some people I think it revolves around three things: the rear diff, tires, and computer. Once I broke 1000 miles, the truck gets 15 on the interstate and 13 around town (I live in an area with lots of hills). Even at 750, I couldn’t get close to this, the sudden change leads me to believe the computer runs the engine on high gas to help with break in. The computer also gets the truck into 10 gear faster now. Also, I’ve always noticed a slight decrease in MPG with any new tires, this is true on all of my vehicles.
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