MPG - Towing

With us gathering tire info and TM weights, I thought I'd ask about mpg.
I'm curious as to what kinds of mpg everyone is getting with their perspective rigs. If you don't mind, can you post what kind of mpg you get while towing, and include some basic stats on your TV (model/engine size/gearing/etc), and what size TM you tow (if it's not already in your signature).
I'll assume most people tow in average or mixed terrain (50/50 flat/hilly) so if you feel most of your towing doesn't fit into this category, please comment.

I know I've seen some individual info posted on this, but I'd like to try to gather as much info as possible to form a good comparison.

My Tundra is an automatic with the 4.7 V8 engine. On all types of trips I average ~13/mpg. The worst I've ever gotten was on US Highway 2 in Northern Monatana, traveling West to East in a strong headwind all day. Got 12mpg that day. The best has been around 13.6mpg.

I get 16 mpg under 65 mph.
15 mpg over 65 mph.

[OneMoBear]

We drop from 20mpg to 15 mpg when towing. Mountains are always involved for us.
Malinda

Our setup is similar to Bfezel. Tundra with small V8 pulling a 3124kb. We average 13 - 14. Worst was 12mpg heading west across Nevada. Best was 16 mpg going downhill out the west entrance of Yellowstone through the Madison valley.

2006 Ford 150, Super Cab, 4x4, 5.4L V8, 3.73 gears pulling a 2003 2720 weighing in around 3500 lbs....14.5 to 16.3 mpg.

Same truck pulling a Surveyor conventional travel trailer weighing in at ~5500 lbs..........10 to 11 mpg.

2001 Durango SLT, AWD, 4.7 L, 3.73 gears, factory tow package. 157K miles. Had about 140K when we bought the TM.

11-13 towing typically in the mountains. 14-17 regular.

[Wavery]

2006 Chevy Silverado, 4.8L V8, auto trans, 3.23 final drive.....towing a 2720.

We've only had the truck a short time and towed with it 230 miles last weekend. Slightly hilly terrain (no mountains) 4 passengers and lots of cargo (including a kayak). We got a shocking 17.7MPG. We filled up when we started out and when we returned, so that is 100% towing mileage. I have no idea what it gets non-towing yet.

We are going on a 800 mile trip next weekend with some mountains and will report back.

[commodor47]

2003 Ford Explorer Sport Trac XLT, 4L, V6, 4x4, 3.73 gearing has averaged 15 - 16 mpg towing and 20 - 21 mpg when not towing. The data comes from two winter trips to Southwest AZ with a return via FL then up the East Coast. Each trip totaled approximately 10,000 miles.

Dick

2006 F150 Extended cab, 5.4 3-valve, 6 speed, 3.55 RE 17mpg - tow between 60 to 62 mph. TM2720