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  #16  
Old 07-03-2014, 03:10 PM
Mavic19 Mavic19 is offline
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If I really, REALLY baby it, I can get 12mpg on my daily commute. On a recent trip towing my toys and with a 10' cabover camper, I averaged 8.5mpg. It's not a gas sipper and wasn't designed to be. But, for the power it delivers, I'm satisfied with the mileage.
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  #17  
Old 07-03-2014, 08:40 PM
muddyforeman muddyforeman is offline
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10.5 Empty, consistently. Towing the camper (11k) 7-8.5 depending on where we tow to.
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  #18  
Old 07-04-2014, 02:05 PM
SteveW84RC SteveW84RC is offline
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Please read my thread "Modified Exhaust."

My truck is a 2000 2v V10.

Looks like taking it easy in town driving I am now getting about 11 mpg.

It likes about 60-65 on the "flat" HWY for best gas milage, which seems to be about 15.5 mpg empty.

Higher octane gives me about .5 mpg higher.

This is a stock motor, only modification is to the muffler/tailpipe.
Suspension is a 5 in. lift, 4.30 gears, and 37 in. tires.
Lot of weight and resistance to push.
Wish I could put the newer 6 speed auto transmission in this truck.

Motor design is, in my opinion, a mistake.
Should be a 4 in. bore by the 4.125 stroke!
3.625 bore is a mistake!
That is another topic for discussion!

Steve in Tucson
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  #19  
Old 07-04-2014, 05:37 PM
CapriMikeC CapriMikeC is offline
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My '99 F250 SC LB w/ 3.73s gets 13-14 empty in mixed driving here in Phoenix. However, I drive it like it's a big heavy truck (slow and boring). When my wife drives it, she gets 11-12. The best I've gotten is 14.1 average on a tank.
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  #20  
Old 07-05-2014, 11:14 PM
SteveW84RC SteveW84RC is offline
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Ah, but CapriMikeC, you all those fantastic 101 and 202 freeways to boost your MPG in the Phoenix metro valley !

Is your truck lifted? Lost milage there.
Does your truck have REALLY heavy tires and wheels? Lost milage there.

I do need to change my plugs. Not sure how many miles on them, but I have put 36K on them, so.............

I have driven in the Phoenix area, and I also get better milage there as well. Might have something to do with the altitude.

Steve in Tucson
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  #21  
Old 07-06-2014, 01:45 AM
CapriMikeC CapriMikeC is offline
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Steve,

Even with only freeway driving such as Phoenix to Las Vegas, the truck only gets 14mpg. It is 2wd, not lifted, and stock size tires.

Elevation can affect mileage. I think the gas blends have a significant effect as well.

I bought the truck with 59K miles in 2005 and it now has 147K miles. I changed plugs around 114K miles. There was no change in mileage but the truck started and cold idled a little better.
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  #22  
Old 07-06-2014, 03:47 AM
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I've had 3 V10 Excursion's all 4x4 with 3.73's

I get 8-10 mpg city 11-14 mpg highway 7-8 mpg towing my travel trailer. I also have a SCT3 tuner with basically a ***** to the wall performance tune.



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  #23  
Old 07-06-2014, 04:30 PM
2004TBIRD 2004TBIRD is offline
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V-10 Real World Mileage

2000 Excursion Limited, 2WD, stock wheels, Michelin tires, Amsoil 0W-30 synthetic, 3.73 gears, loaded w/six adults & tailgating gear.

Best Ever: 165 mile test, flat interstate - 15.7 MPG with E0, cruise set @ 75

With E10: Same 165 mile test route, load & cruise - 14.5 MPG

Normal mix of town/highway 11 - 13

Note: Above reflects changeover to synthetic which bumped prior average 1 - 1.5 MPG
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  #24  
Old 07-07-2014, 09:26 PM
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  #25  
Old 07-07-2014, 09:43 PM
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I was reading over on the v8 superduty. Does not sound like the v8 does much better than the v10.
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  #26  
Old 07-07-2014, 09:47 PM
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Originally Posted by wendal View Post
I was reading over on the v8 superduty. Does not sound like the v8 does much better than the v10.
Had the 5.4 V8 in the 06 F250 and got maybe 1-1.5 better. But that was an ext cab long bed and not a CC long bed dually like the 350. Plus the V10 just moves when you mash the skinny pedal.
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  #27  
Old 07-10-2014, 02:53 AM
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Had my 2010 for a month now, it is dead stock with 50k miles. It has 4.10 gears & according to the build sheet it rolled off the line with 18" wheels. Apparently some fool thought it needed a set of the factory 20"s on it before I found it. Combined city/highway unloaded was getting 10 mpg. Bought a set of factory 17"s and Toyo ATIIs in 265/70/17, now I'm getting 11 mpg. Have a Flowmaster ex. & Airaid intake waiting to go on, probly wait 'til I get the SCT tuner & do it all at once. After I get the snow plow springs off the front & a B&W Companion hitch, it'll be time to sell the old diesel.

Oh yeah, my work truck is a 2012 F450 V10 auto with aerial lift (aka AT&T bucket truck). It weighs somewhere south of 12k lbs, gets 7 mpg, and the 4.88 gears make it move off the line. Driving this baby for the last 6 mos. is what convinced me I did NOT need to pay $7-8,000 more for a diesel in my new-to-me personal truck.
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  #28  
Old 07-10-2014, 09:01 AM
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On 7-2-14 I posted about getting 14 MPG while delivering my HiLo camper then returning empty. Well yesterday I repeated this trip (of course in reverse order, going up empty then pulling it home).

Same exact roads, same gas source (93 octane), same outside temps/environment, same driving characteristics (grandpa), yada/yada/yada.

As I think I still have some engine stumbling I'm going back to 87 octane.

Anyways, this time I only got 11 MPG. Go figure.
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  #29  
Old 07-10-2014, 06:37 PM
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2005 F350 LB CC V10 4.10 gears

Empty on the freeway ~9.5mpg
Mixed around town ~8.5mpg
Towing 5-8k ~6-7mpg (depends on how many hills we have to conquer)

Disclaimer: I'm not known to have a light foot.

I'd probably do better if I wasn't running a 4" lift with 35's but I will never know...

However the little 5.7L GMC half ton this replaced only got 11ish around town, 12-13 on the freeway and I don't even want to know towing. That was with just a TB crank lift/blocks and 285 tires but wimpy 3.43 gears...

I'm ok with the mileage compared to the price of a comparably equipped diesel and the on-going maintenance required.

Makes me smile every time I get behind the wheel.

Click the image to open in full size.
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  #30  
Old 07-11-2014, 12:28 AM
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I owned a 2001 F250 2v supercab. Always gave me 10 mpg. Thats why when the wife told me I could have a new to me truck I started looking at diesels. We drive 20010 6.7 for work and they have been in the shop CONSTANTLY. Cab off ever other trip in.
I finally settled on a 2009 King Ranch with the 3v. We just got back from Anehiem (dippy land) and besides the parking, She was a blast. speed limit between SLC and most of the way there is 80 now, so I did 90, with a bed cover I averaged 12.5 MPG at the pump not the computer. Don't have my new fifth wheel yet, but can't wait to double down to lake Powell with the new toy!!
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Old 07-11-2014, 12:28 AM
 
 
 
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