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Old 03-26-2013, 02:01 PM   #281
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I just purchased a preowned 2010 Tundra SR5 Double Cab 2wd about 10 days ago. I will be hitching it up to a 2008 Classic 25FB. The Classic wardrobe door sticker show about 6000lbs dry weight.

I currently have a 2009 Casita 17 Spirit Deluxe about 3200-3500 lbs. I was towing it with the Tundra this past Sunday and their was a pretty stiff wind out the north and it seemed I had headwinds most of the time. I had the instanteous mileage turned on and most of the time I was seeing 9, 10, 11 mpg on the display. There were a few mild hills.

What is it going to be like with say 6500lbs in tow with a larger profile than the Casita (rounded shape like an AS)? I'd hate to only get 8mpg with only a 26 gallon tank. I'd have to fill up every 180 miles. I only drive 55 to 60 mph. Can I expect to get 10 to 12 mpg?

I drove the Tundra solo on a 900 mile trip and was very satisfied with the mileage 19 to 20mpg driving 70mph (no AC) and that is calculated by dividing the odometer with gas pumped at each fill up.

Thanks

Kelvin
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Old 03-26-2013, 02:22 PM   #282
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Originally Posted by KJRitchie View Post
I just purchased a preowned 2010 Tundra SR5 Double Cab 2wd about 10 days ago. I will be hitching it up to a 2008 Classic 25FB. The Classic wardrobe door sticker show about 6000lbs dry weight.

I currently have a 2009 Casita 17 Spirit Deluxe about 3200-3500 lbs. I was towing it with the Tundra this past Sunday and their was a pretty stiff wind out the north and it seemed I had headwinds most of the time. I had the instanteous mileage turned on and most of the time I was seeing 9, 10, 11 mpg on the display. There were a few mild hills.

What is it going to be like with say 6500lbs in tow with a larger profile than the Casita (rounded shape like an AS)? I'd hate to only get 8mpg with only a 26 gallon tank. I'd have to fill up every 180 miles. I only drive 55 to 60 mph. Can I expect to get 10 to 12 mpg?

I drove the Tundra solo on a 900 mile trip and was very satisfied with the mileage 19 to 20mpg driving 70mph (no AC) and that is calculated by dividing the odometer with gas pumped at each fill up.

Thanks

Kelvin
You were most likely hurt by the headwinds more than anything else. The weight of the trailer only costs you a lot when you're getting it rolling or if you change speeds a lot.

Don't freak out too much about the instantaneous mpg readings, either... I think I have a tendency to only look at that when I know the truck is actually pulling, so I always see those 6s and 8s and still end up with 11ish in normal conditions, and I drive 65 and am not overly patient about waiting around for 65.

If you can stick to 55-60 I think 12mpg should be attainable even with a widebody. There are lots of Tundra owners on here with widebody trailers, they'll probably offer some real-world numbers (hopefully including their average speeds.)
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Old 03-26-2013, 02:25 PM   #283
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Does everyone use the Tow/Haul button when towing their fat Airstreams?

Kelvin
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Old 03-26-2013, 02:45 PM   #284
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There are lots of Tundra owners on here with widebody trailers, they'll probably offer some real-world numbers (hopefully including their average speeds.)
The lowest I've gotten is 12 mpg, the highest 14 mpg. Depends on the terrain, speed (usually around 60 mph) and if I remember to inflate the tires!
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Old 03-26-2013, 02:46 PM   #285
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Our Tundra gets 13.5 mpg towing our 19-foot Bambi at 60 mph. 16.5 mpg at 55 mph or slower (on the flats and in the mountains). We do not use tow/haul mode due to small size of our trailer and the excess power available. However, tow/haul mode is probably appropriate for your Airstream.

With new Tundras and large V8, the tendency is to enjoy the new found power. After the newness wears off and you start using the cruise control more (and stop passing other vehicles), your mileage will improve. Also, the headwind probably didn't help on your last trip.

Also, Mike 91208 makes a good point about tire pressure. When towing, we run 55 psi in the front tires, 65 psi in the rears; and 80 psi on the Bambi. (All tires are load range E).

I would be really surprised if your mpg's are consistently below 10 unless you are constantly pulling mountain grades or cruising above 65 mph.
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Old 03-26-2013, 02:46 PM   #286
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Does everyone use the Tow/Haul button when towing the fat Airstreams?

Kelvin
I always use it, although mine tows just fine without it.
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Old 03-26-2013, 06:12 PM   #287
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Tow - Haul

I use mine all of the time when towing. Also I run it in 5th gear, it keeps the trans from shifting too much.
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Old 03-26-2013, 07:44 PM   #288
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I use Tow/Haul mode and run in 5th as well. Getting over 12mpg traveling through out Wyoming.
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Old 03-26-2013, 07:48 PM   #289
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Kelvin

I use tow haul with our 2006 Safari 23 which has 6000 lb dry weight. Towing with 2011 Tundra Double Cab 5.7.

I really haven't spent the time to try to nail down the mileage. i have grade model so it doesn't have instantaneous mileage, so I'd have to do it the old fashioned way.... fill the tank, drive the miles, refill tank and divide.... i will say that I don't tow above 60.... mostly because I think that's plenty fast enough
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Old 03-27-2013, 07:15 AM   #290
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So most people are getting a safe driving range of about 250 miles?

I noticed on the first tank of gas I let run below the 1/4 mark that around 1/8th position the fuel warning light came on. I filled the tank within a few miles and it only put in barely over 20 gallons. I fill until it auto shuts off then squeeze in to get to the nearest whole dollar. So that means when the light comes on I still have about 5 gallons left and I should be able to safely go another 30-36 miles towing (looking for a gas station) and have over a 2 gallon reserve.
Is that everyone's experience?

When you run it in 5th gear then you move the stick to the S position and then upshift from 4 to 5? Will the transmission still automatically shift down automatically as needed?

Thanks.

Kelvin
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Old 03-27-2013, 08:10 AM   #291
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Towing with tundra

We have a 2010 tundra with the large engine and pull a 25' 2008 FBSE very satisfactorily. Much depends on tow speed and terrain insofar as fuel. Life is quieter with gas tow vehicle and the ride is good. The experiences recounted in other threads match ours. Tow/haul is very useful, especially at moderate speed. This is our third Tundra and second Airstream. If the trailer exceeds 25' the towing dynamics change noticeably. Until that point one can forget towing and parking drama.
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Old 03-27-2013, 08:20 AM   #292
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I know several guys that own Tundras. Generally they love them and report they are good truck. They all report poor mileage though - 14-16mpg highway, unloaded. Gobs of power is the trade off I suppose.
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Old 03-27-2013, 08:49 AM   #293
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The guys that are getting 14-16mpg must have a lead foot. I get 18-20mpg.
And yes when you run in S5, it will shift down automatically. You are just setting the shift "up" limit.
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Old 03-27-2013, 10:28 AM   #294
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Quote:
Originally Posted by KJRitchie View Post
I noticed on the first tank of gas I let run below the 1/4 mark that around 1/8th position the fuel warning light came on. I filled the tank within a few miles and it only put in barely over 20 gallons. I fill until it auto shuts off then squeeze in to get to the nearest whole dollar. So that means when the light comes on I still have about 5 gallons left and I should be able to safely go another 30-36 miles towing (looking for a gas station) and have over a 2 gallon reserve.
Is that everyone's experience?
Yup. The gas gauge and light appear to be very pessimistic. Even with it reading dead empty I don't think I have ever put in over 22 gallons. I don't like it as it makes me nervous even though I know I can still go another ~40 miles.
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