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Old 10-08-2014, 02:46 PM   #57
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2010 2wd Tundra Double Cab 5.7L towing a 2008 Classic 25fb. Last October we traveled from DFW to Disneyworld. I hand calculated every fill up. We got 11+ to 12+ mpg driving mostly interstates at 60mph. I found driving in 5th gave as good a mileage as 6th despite slightly higher rpms but my foot was lighter on the pedal.

When we had our Casita and our 4Runner 4.7L V8 I found better mpg driving to Glacier Natl Park than driving around Texas. Maybe the high altitude helps or the gas has a different formula. Mostly 85 octane when getting into Colorado, Wyoming and Montana. On some legs of those trips I got as high as 15mpg. We haven't had the fortune of taking our Airstream back to Glacier yet so I can't compare. Not so much for the dollars spent but for the convenience of range. Sometimes and extra 30 or 40 miles range helps.

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Old 10-08-2014, 02:59 PM   #58
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2008 Sequoia (same stuff under there as Tundra - different rear axle but same ratio). Calculated average of 10.7 mpg towing 23' Safari, loaded. All conditions. Sea level to 11,000 feet. Wind on all quarters. 120,000 miles on SUV and still going strong. Love it.
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Old 10-09-2014, 03:22 PM   #59
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Putting the transmission into neutral while going downhill has 2 problems:

1. No matter what gear you are in, if you don't depress the gas pedal, you don't use any more gas than being in neutral. Your RPM's will change, but no more gas.

2. It is unsafe. You get no engine braking in neutral and have to use the brakes much more, thus possibly causing brake fade, rotors to warp from excessive heat and pad wear. I downshift—that slows the truck and I try to stay off the brakes.

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Old 10-09-2014, 03:34 PM   #60
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Not to mention that it may be illegal in whatever state you happen to be coasting through...
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Old 10-09-2014, 04:00 PM   #61
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I get between 11.8 and 12.5MPG towing between 55-58 with roughly 1,000lbs of *stuff* in the bed and back seat. That average is over about 19K miles last year from Alaska to North Carolina and criss crossing the country twice after that. Not towing I get 21ish on the highway and 14.7 in a mix of highway/city driving. I love my Tundra!
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Old 10-09-2014, 04:44 PM   #62
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Getting 10-12 mpg in a truck that is paid for is better than buying a $45,000 truck to get 13 mpg...
How much gas can I buy for $45,000?
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Old 10-09-2014, 06:02 PM   #63
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Getting 10-12 mpg in a truck that is paid for is better than buying a $45,000 truck to get 13 mpg...
How much gas can I buy for $45,000?

Bingo....
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Old 10-10-2014, 08:20 AM   #64
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No. I'm referring to the fact that I could jump off a mountain with my mother and not get hurt because I braced myself using the levels of gravitivity and polarity-
No such word as gravitivity. Just plain gravity.
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Old 10-10-2014, 01:25 PM   #65
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Just north of El Centro, CA where it is 250' below sea level. I recorded 18.5 mpg for about 50 miles while heading for Julian.
Towing a 26' Argosy with my '08 Tundra normally get between 12 and 14mpg. Never use 6th gear and only use 5th when on flat ground. 4th is preferred. I drive no faster than 60mph. Only drive slower when road or traffic conditions require it. NEVER coast down a grade in neutral.
Just returned from a 9 day trip to Vegas. Averaged 12.9 driving at elevations between 4K and 10.8K feet. Averaged 12.9 for the 2,000 mile trip. That's a 4mpg improvement over my '98 Dodge 2,500 with a 360V8.


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Old 10-10-2014, 06:12 PM   #66
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No such word as gravitivity. Just plain gravity.

I know there is no such word as gravitivity. I was just being silly.
Maybe you are being silly now. Surely you noticed more in that post than a non-word.
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Old 10-11-2014, 05:12 AM   #67
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Gravitivity is a cool word! I love making up silly new words like that. I have one friend that's an english teacher, and another that just thinks that he is. When I'm around either of my phonically correct friends I throw silly made up words out there as they come to me, I'll toss in a couple of double negatives here and there to make their day extra special. Fun Stuff!
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Old 10-11-2014, 07:17 PM   #68
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I like making up non-existent Spanish words, too. It's good for a laugh. Mi trailer para acampar es muy expensivo.
Got 13+ mpg on a 9 hour trip to Texas today. Happy happy happy! The Interstate traveling with us got 22 mpg!
The Tundra truly seems to get the very best fuel mileage between 55 and 65. This trip had a lot of 61-63 mph driving.
Fuel economy suffers at 5o mph on the Natchez Trace and at 70 on the Interstate.
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Old 10-12-2014, 10:01 PM   #69
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Originally Posted by Gene View Post
Putting the transmission into neutral while going downhill has 2 problems:

1. No matter what gear you are in, if you don't depress the gas pedal, you don't use any more gas than being in neutral. Your RPM's will change, but no more gas.

2. It is unsafe. You get no engine braking in neutral and have to use the brakes much more, thus possibly causing brake fade, rotors to warp from excessive heat and pad wear. I downshift—that slows the truck and I try to stay off the brakes.

Gene
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I respectfully disagree. As in lots of things, it just depends on how steep the downhill stretch is. If it is a gentle slope, I will put it in neutral and just coast. I might be at 60 when I shift to neutral and then shift back to drive when I hit 55. If it is a steep slope then I just leave it in gear and let the transmission braking control my speed. In any case I don't use the brakes to control my speed. I have a floor mounted shift, and I find that it is very easy to downshift and use engine braking when needed. My Tundra has 60k miles on it and I expect to get 100k on it before I need to change the pads. I had 150k on my BMW 330ci, 5 speed manual, before I needed to change the pads as I drive conservatively and downshift a lot to stay off the brakes.

Dan
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Old 10-12-2014, 10:57 PM   #70
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I have the same TV and I don't see any advantage to shifting into neutral.
If your foot is not on the throttle. The position sensor is at the minimum output. You are not calling for fuel.
So how do you figure you are saving fuel?
I agree with Gene. Driving in neutral is not safe and is probably illegal in most if not all states.



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