I only have 2900 miles on my truck so far but here's my averages so far. I didn't keep track of the first few tanks but it was only 11-12MPG and it was really scaring me. I've noticed though as the engine is breaking in it is slowly getting better. I have an 08 LTD with the stock 275/55 R20 tires.

View attachment Crewmax Gas Mileage Log.pdf

 

I was getting around 12mpg pretty consistently the first 6 months or so that I had my truck. I am just over 10,000 miles and mpg has gone up to around 15. On a recent 800 mile round trip to Mammoth I was averaging 18-20mpg with average speeds of 75+ on stock Michelin tires. I just put on 34.5 nittos and so far I haven't seen a significant drop in mpg.

 

I average 13.5 mpg towing a 6x10 enclosed 8ft high trailer that weighs 3K lbs. I have a DC with the 5.7 and everything is stock.

Without the trailer, I get aprox 17mpg with mixed driving.

 

i average 18.2 with 70/30 highway/city, hand calculated (trucks computer is only 2 tenths off everytime usually) and i like to get on it occassionally...havent averaged with the new wheels, but i had the trd wheels and stock tires

 

I bought mine for the power, but fuel economy is nice too. With that said, I'm getting 15.8 to 16.3 MPG .... which is better than my 02 Tundra that had significantly less power. I'm not complaining.

 

Averaging 15-17 mph with topper and 325 Nittos...4.7L

 

mine does get better than my dad's 08 silverado crew cab ltz...he was pretty pissed about that haha and they are suppose to get the best around or whatever

 

I just got a 2009 dc 4wd with the off rd pack , 5.7 I am getting 17 -18 all around which I am happy with , my tacoma was getting the same with alot less power , and louder motor, the tundra is really smooth

 

I came from an 04 Quad Cab Dakota 4x4 with 4.7 that got high 13s to low 14s in normal driving no matter what I did or where I drove.

Now in an 09 Crewmax SR5 5.7 4x4 with stock 18 inch wheel and tire package and nothing else yet. Took a road trip immediately after buying the truck and got about 17 while driving gently (Cruise below 70 with no heavy throttle) and low or mid 16s while driving balls to the wall with a few full throttle runs from 60 or 70 to 100. (If my gf, who is even more lead footed and aggressive than myself, can take the wheel and still net 16.5 mpg in this thing on the highway that is impressive.) The Dakota never saw more than 16 mpg even on the highway, more like high 15s. The only time I ever get 16.5-17 mpg on that thing was on a long road trip with the cruise set at 55-65 and ZERO wide open throttle runs. This is all my own calculations, simply number of miles traveled bet. fillups over number of gallons put in tank, not the trip computer.

At the start of the road trip with the Tundra there were under 200 miles on it. I'm quite happy. You want the big-dog look, you gotta pay the piper. My first suggestion to see an improvement is to drive like you're 85 and wearing coke bottle glasses as much as possible. At this point that makes a bigger difference in terms of cost vs. benefit than any mod you'd pay for. I don't know what types of fluids these things run but maybe start with looking at all synthetics. If you want you could try 500-1000 dollars for an exhaust/intake and MAYBE net a 1-2 mpg gain. Narrower tires that are considerably lighter might do something for you but the real issues are rolling resistance and revolutions per mile.

Did I do a good job of not raggin on a guy who bought a 5800 pound pickup, added larger than stock all-terrains and a levelling kit, 'stomps on it every now and then,' then asked how to improve fuel mileage?

 

I came from an 04 Quad Cab Dakota 4x4 with 4.7 that got high 13s to low 14s in normal driving no matter what I did or where I drove.

Now in an 09 Crewmax SR5 5.7 4x4 with stock 18 inch wheel and tire package and nothing else yet. Took a road trip immediately after buying the truck and got about 17 while driving gently (Cruise below 70 with no heavy throttle) and low or mid 16s while driving balls to the wall with a few full throttle runs from 60 or 70 to 100. (If my gf, who is even more lead footed and aggressive than myself, can take the wheel and still net 16.5 mpg in this thing on the highway that is impressive.) The Dakota never saw more than 16 mpg even on the highway, more like high 15s. The only time I ever get 16.5-17 mpg on that thing was on a long road trip with the cruise set at 55-65 and ZERO wide open throttle runs. This is all my own calculations, simply number of miles traveled bet. fillups over number of gallons put in tank, not the trip computer.

At the start of the road trip with the Tundra there were under 200 miles on it. I'm quite happy. You want the big-dog look, you gotta pay the piper. My first suggestion to see an improvement is to drive like you're 85 and wearing coke bottle glasses as much as possible. At this point that makes a bigger difference in terms of cost vs. benefit than any mod you'd pay for. I don't know what types of fluids these things run but maybe start with looking at all synthetics. If you want you could try 500-1000 dollars for an exhaust/intake and MAYBE net a 1-2 mpg gain. Narrower tires that are considerably lighter might do something for you but the real issues are rolling resistance and revolutions per mile.

Did I do a good job of not raggin on a guy who bought a 5800 pound pickup, added larger than stock all-terrains and a levelling kit, 'stomps on it every now and then,' then asked how to improve fuel mileage?

Thanks for the info. It was very informative. And yes, you did a good job on replying without raggin....it was actually a little humorous. Thanks!

 

1. Slow down.
2. Keep it under 2k, not 3k RPM.
3. Properly inflate your tires. I slightly overinflate mine, actually (35psi)
4. Slow down.

My only other suggestion is to drive less, but that isn't any fun.

~A

 

Nope, we dont get great fuel economy, do we...

I have heard that removing the charcoal filter from the top of your air intake helps a little bit - do a search for that mod if you are interested...

I have about 15K miles on my '08 CMax and I regularly get right at 16 MPG.

Towing approx 5000lbs of boat/trailer or jeep/trailer or travel/trailer I tend to get about 12.5 MPG...

For several years I ran an F-350 diesel dually towing the same setups and got 14 MPG no matter if I had the trailer on or not.... so it's a wash in my opinion... and the Tundra is sooo much nicer to drive.

Z

 

Duck tap over the Gauge.

 

Tie a sting from your right big toe to your "boys", that'll help you ease into the throttle.

Mixed driving, DC with a 5.7, 305/65R18 BFG ATs and a 3" Truxxx lift...
I get consistently get 13 to 15 with winter gas.
Now, with the summer mix, I get 16 to 17 and have seen into the 18s.
Keep in mind, the 5.7/6 speed combo is getting the best mileage at around 45 mph, on a flat road, when in sixth gear. With a re-set, at speed, mine sees 24 to 26 mpg average after 10 miles with no stops, slowdowns, or hills. But throw a stop in there, higher speeds, or a downshift, and it starts to dive.

Results will vary!

 

Tie a sting from your right big toe to your "boys", that'll help you ease into the throttle.

Mixed driving, DC with a 5.7, 305/65R18 BFG ATs and a 3" Truxxx lift...
I get consistently get 13 to 15 with winter gas.
Now, with the summer mix, I get 16 to 17 and have seen into the 18s.
Keep in mind, the 5.7/6 speed combo is getting the best mileage at around 45 mph, on a flat road, when in sixth gear. With a re-set, at speed, mine sees 24 to 26 mpg average after 10 miles with no stops, slowdowns, or hills. But throw a stop in there, higher speeds, or a downshift, and it starts to dive.

Results will vary!

Is it because mine is a CM and yours is a DC that you get better mpg? I have the same set up: 5.7L 4x4 TRD, 305/65/18, Volant CAI and a 3" leveling lift. About 85-90% of the time, I am driving normal, but I am still only seeing in the 12-13 range. I don't understand why I get lower than you do!

 

Is it because mine is a CM and yours is a DC that you get better mpg? I have the same set up: 5.7L 4x4 TRD, 305/65/18, Volant CAI and a 3" leveling lift. About 85-90% of the time, I am driving normal, but I am still only seeing in the 12-13 range. I don't understand why I get lower than you do!

I'm on the freeway for 50 miles a day and when I'm being frugal, I do not exceed 60mph as much as possible, I also keep my truck shifting before it reaches 2000 rpms. If I start stabbing it from stoplights a couple times a day, or get pissed in traffic and blow by someone that's hogging the left lane, my mileage suffers...greatly.

How fast do you drive on the highway?
How quickly do you get up to speed?

It's a big, un-aerodynamic, heavy brick. The only way to get where some of us others are is to lighten up on the skinny pedal.

Another thing, have you added back in the 5% (+/-) you lost when going to the bigger tire? You need to take your miles driven and multiply them by 1.05 before you divide by the gallons in. That will correct and compensate for the different tire size.

 

I've only been getting 13.7 or so lately, but I enjoy the drive and don't mind getting sideways at 0200.

 

Like everyone says - ease up on the skinny pedal an d the mpg will come up. Also as your truck breaks in more the mpg will increase, unless I use Chevron or some good brand fuel I get 16 highway, but when I get better fuel I can get up to 20.8 highway using the cruise at 75. I did the charcoal filter removal and almost fainted - the mpg dropped to 14 all the time for about 8 tankfuls and then came back better than before.
I am also using Royal purple - cant honestly tell if that does anything - yet

 

I'm on the freeway for 50 miles a day and when I'm being frugal, I do not exceed 60mph as much as possible, I also keep my truck shifting before it reaches 2000 rpms. If I start stabbing it from stoplights a couple times a day, or get pissed in traffic and blow by someone that's hogging the left lane, my mileage suffers...greatly.

How fast do you drive on the highway?
How quickly do you get up to speed?

It's a big, un-aerodynamic, heavy brick. The only way to get where some of us others are is to lighten up on the skinny pedal.

Another thing, have you added back in the 5% (+/-) you lost when going to the bigger tire? You need to take your miles driven and multiply them by 1.05 before you divide by the gallons in. That will correct and compensate for the different tire size.

I drive at the speed of 65-70 on HWY and the truck has been shifting gears between 2500 and 3000 RPM's. I guess I can ease up on the pedal some more to get better gains. Either way, I still love the truck!! I am trying to get the most out of every aspect of it.

Thanks for the help and thanks to everyone else for their input and comments!

 

My readout says 15-16mpg with 90% city driving. ON the interstate with the cruise set on 80 I get 16mpg.

I reset my mpg computer the other day before making the trip to my hunting camp which is about 2 hours away. Mostly Interstate with about 30miles of county road driving. Truck averaged 18mpg which is stupid good for this beast.

I do run premium and also have a bed cover on my 08 CM limited 4x4

 

I'm at 17.1 on the truck's average. I havn't reset it since I got it and I have 20k miles on it. I usually never get over 2k RPM and never stomp on it unless I really need to pass something quick.

 

I still believe that the truck could get alot better MPG, if it would shift earlier... I find that my truck doesn't seem to understand anything between grandpa driving(which is just entirely too slow acc for me) and hauling booty and tac'ing out at a minimum 4K...

I may be retarded, but it just seems that for the amount of throttle I'm giving it, it wants to run the RPM's too high and shifts too late... not to mention how long it takes for it to shift...


If I could figure out how to make the tiptronic shifter right, as it's backwards from Toyota, then I could test my theory... But being that it's backwards, and that I can't wrap my head around Toyota's thinking, I cannot use the titronic... I constantly downshift when meaning to upshift...

 

With your lift and tires, you are going to get crappy mileage. Mine dropped when I added my lift/wheels/tires. I get an average of 13.4 mostly city driving, compared to 15 before. If mileage is your thing, get a smaller tire with less rolling weight. If you want even better mileage, take out the lift. Don't take out the charcoal filter, read the threads, the jury is still out on that one.

As everyone else has said the best way to increase MPG is to ease off the pedal...

 

I still believe that the truck could get alot better MPG, if it would shift earlier... I find that my truck doesn't seem to understand anything between grandpa driving(which is just entirely too slow acc for me) and hauling booty and tac'ing out at a minimum 4K...

Thats what I am seeing. 55mi/h on gentle rolling hills absolutely blow for my MPG. The truck is downshifting to 4th to make me maintain 55mi/h on cruise when 51mi/h up the hill is just fine. I dont use the CC for that reason. However, the sweet spot for me is approximately 70mi/h. At 70mi/h I get approx 20-22 MPG on the highway, but at 55mph, I drop down to 16. (yeah, I drive like an old man, but I like my cheap insurance rates)

If I could figure out how to make the tiptronic shifter right, as it's backwards from Toyota, then I could test my theory... But being that it's backwards, and that I can't wrap my head around Toyota's thinking, I cannot use the titronic... I constantly downshift when meaning to upshift...

Heh, I thought it was just me. I am always "tapping up" thinking I'm downshifting and vice-versa. I think its because of my 6-sp manual I enjoyed a bit too much in another car.

I might bitch about the fuel economy, but hell, I get equal or better mileage on this beast than I ever got with my S10. If I stomp on it, yeah, I like making the instant-gauge go to 3's :thumb:

 

trade the monster 5.7L whop _ss beast in for a 2010 4.6L V8 tundra with the 4.10 gear ratio. They say it will get 2-3 more mpg and probably be doable, but you won't get that 'put you back in the seat' feeling you get with the 401lb. torque monster. The new 4.6L V8 will have around 335lbs of torque or so (I think around there), and will be very similar to the 5.7L v8 chevy silverado but with more snap off the line and more pulling power thanks in part to the 4.10 gear ratio vs. Chevy's wimpy 3.73 ratio. Worth considering, but you won't get that same grin on your face when someone wants to 'feel lucky punk' and waste you off the line.