Sorry Jaetee, we've been through this before and it isn't very exciting.
FWIW, I have an 04 I4 2WD, and last weekend fully loaded with me, wife, 2kids, black lab, outboard motor, tons of stuff we headed 270 miles each way on a weekend trip. Mileage was 25.8 mpg. The tank before that was 50/50 city hwy, 24.3mpg. The best I've ever gotten was 28 mpg, worst is about 21 in winter. Towing gets me down in the teens pretty quick.
I'd love a scanguage. When I take along trip I set the cruise at 75~80 mph and forget it. I'm sure if I slowed down it would be much better, but I don't have the time.
Also, I run my tires at 35psi and keep a pretty well maintained rig. I'm at 60k miles.
06, AWD gives us 20-22 MPG. All that other #s on the sticker are a joke (the EPA is a joke, they must ensure the manufactures give correct #s).
The 25-26MPG is w/ all seats removed other than the driver seat, spare tire removed, a emanipated Japanese test driver testing the vehicle w/ a wind tunnel blowing from the back of the vehicle at 60 MPH.
08 AWD V6, 19 around town, 22 on highway on 87 octane. Mileage picked up noticably at 10k mark.
By comparison, my 2009 Subaru Forester X (base model) gets 22 around town and 26 on highway (without the roof racks), but it's nowhere near as comfortable on long rides.
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2008 Highlander, 2008-? (family cruiser)
2009 Subaru Forester 25x (to replace my third Dodge Raider as sport/commuter vehihcle)
08, v6, 4WD, - Highway, old man driver, max of 28, ave of 26/27 - reg gas - computer sometimes shows over 30 for short distances; around town/mixed 23/24.